Optimove: Existing Players Drive Betting Uptick Amid August Retention Dip

August 2026 saw a sector-wide drop in customer retention across the four largest regulated European iGaming markets, but data from Optimove confirms that increased engagement and higher average bet values among returning players kept casino and sports betting volumes climbing. The report, drawing on 6.2 million monthly active accounts, points to deeper activity from existing customers, even as new player retention fell sharply post-World Cup.

Optimove Data: Context and Methodology

Optimove compiled deposit and betting activity figures for Greece, Italy, Spain, and the United Kingdom for the 12 months ending August 2026. Data capture is based on active player records, with monthly averages calculated from operator feeds amounting to 6.2 million users each month. The analysis covers average deposit, casino and sports bet amounts, days of active play, and rolling retention rates.

Definitions used in the Optimove report

• Average deposit amount: Total deposits divided by players making at least one deposit.
• Casino/sport bet amount: Total placed bets divided by bettors who wagered at least once.
• Average activity days: Average number of days a player was active during the month.
• Active retention rate: Percentage of one-month-active bettors who remained active the next month.

Core Findings: Retention Down, Value Metrics Up

All four markets saw a downturn in retention rates in August, a shift Optimove links to seasonal player inactivity — particularly the end of the World Cup, summer holidays, and gaps in domestic leagues. Despite lighter customer retention, value metrics trended up:

• Average deposit, casino bet, and activity day numbers all rose compared to July 2026.
• Spain led the casino expenditure rankings, averaging $3,142 over 12 months, while Greece led in sports betting averages at $813.

The key implication: operator revenue growth in August depended less on keeping new customers and more on sustained, higher-value play among the existing base.

Market-by-Market Breakdown: European Betting Metrics

Greece

• Average deposit: $580 in August; 12-month average of $558
• Casino betting: $2,971 in August; 12-month average of $2,843
• Sports betting: $756 in August; 12-month average of $813
• Activity days: 11.3 in August; highest among the markets
• Active retention: Dropped to 80% in August (avg. 84%)

Italy

• Average deposit: $308 in August; 12-month average of $309
• Casino betting: $1,681 in August; 12-month average of $1,767
• Sports betting: $448 in August; 12-month average of $472
• Activity days: 7.6 in August (lowest)
• Active retention: Fell to 78% in August (avg. 81%)

Spain

• Average deposit: Jumped from $254 in July to $324 in August, a 28% increase
• Casino betting: $3,511 in August; 12-month average of $3,142 (highest casino spend)
• Sports betting: Rose from $509 in July to $706 in August (+39%)
• Activity days: 8.3 in August; 12-month average of 9.2
• Active retention: Plunged from 80% in July to 57% in August (avg. 78%)

United Kingdom

• Average deposit: $279 in August; 12-month average of $255
• Casino betting: $1,319 in August; 12-month average of $1,207
• Sports betting: $343 in August; 12-month average of $348
• Activity days: Up to 8.5 in August
• Active retention: Dropped from 76% to 69% (avg. 77%)

"The gradual return of European championships and operator engagement efforts after the World Cup likely contributed to the broad rise in sports betting in August," the Optimove team noted.

The Retention Challenge After the World Cup

The sharpest retention decline—Spain's 23-point drop to 57%—is attributed to a wave of casual players who registered for World Cup offers but failed to remain active during the summer lull. This suggests a need for operators to rethink post-tournament retention campaigns if they hope to capitalise on event-driven acquisition. Cross-market averages indicate that maintaining customer momentum across seasonal fluctuations remains difficult. The figures contrast with stronger growth in value and engagement metrics, highlighting a dependence on core customer segments over fleeting sign-ups.

Implications for Operators: Coupling Value Growth and Retention

As betting amounts and player activity intensify among returning users, the overriding challenge for operators is translating this momentum into sustainable, long-term revenue. Optimove's analysis calls out the necessity of pairing increased betting value with loyalty initiatives to convert August engagement into year-round retention. Multi-market operators face the specific task of bridging the gap between World Cup traffic spikes and the resumption of domestic sports leagues.

Operators may also need to refine segmentation, distinguishing between one-off event-driven players and those likely to maintain activity through off-peak periods. The patterns seen in 2026 align with past cycles, but the scale of the retention drop—particularly in Spain—adds urgency to efforts around customer lifecycle management and loyalty programming.

Key Metrics for Monitoring Market Health

Optimove's monthly data set provides concrete benchmarks for measuring both value and engagement:

• Spain leads in casino spending; Greece in sports betting and activity days
• Consistent August growth in deposit values across all markets
• Retention remains lowest in the UK and Spain post-July

Strong short-term performance underscores the risk that without new retention strategies, operator volume could become increasingly dependent on a shrinking pool of high-value existing customers.

"Operators may need to pair current betting momentum with retention-focused campaigns to convert August's activity into sustained engagement," Optimove concludes.