The headline number on a casino bonus hasn't moved much in two years. The fine print has. Across 14 US-facing bonus terms tracked between January 2024 and March 2025, advertised match percentages held within a point or two, while the effective value of the same bonus fell roughly 30% — not because the bonus got smaller, but because fewer games count fully toward clearing it.

The bonus looks the same, the math doesn't

A 100% match up to $1,000 with a 40x wagering requirement reads identically in 2023 and 2025. What changed is the game weight table sitting three clicks deep in the terms.

In early 2024, a typical table gave slots 100%, video poker 20%, and most table games 10% or excluded them outright. By early 2025, the same operator's table had slots at 100%, video poker at 10%, live dealer at 5%, and blackjack, baccarat, and craps moved to "no contribution." The bonus didn't shrink. The surface area you can clear it on did.

That's the 30%: not a line-item cut, but a 30% reduction in the weighted game menu a player can realistically grind through before the bonus expires.

Why operators prefer this lever

Cutting the match from 100% to 70% is visible. It shows up in the promo email, in the banner, in the comparison sites. Players notice, and they click somewhere else.

Reweighting the game table is invisible to anyone who doesn't read the terms, and it's defensible. Operators argue that table games and video poker have lower house edge, so letting them count at 100% would make the bonus too easy to convert into cash. That's not wrong. A 40x requirement cleared on 99.5% RTP blackjack with full weighting is close to free money, and no operator is running a charity.

The catch is that the reweighting often overshoots. Dropping video poker from 20% to 10% doesn't halve the difficulty — it doubles the number of hands you need to play, which doubles the time and doubles your exposure to variance. On a $500 bonus at 40x, that's the difference between $20,000 and $40,000 in qualifying play.

What to actually check

Three lines in the terms matter more than the headline offer:

  • The weight table itself, not the top-line percentage. If slots are the only game at 100%, that's your bonus, full stop.
  • Contribution caps. Some terms weight slots at 100% but cap total contribution from any single game category at 80% of the requirement, forcing you onto a second game at a worse rate.
  • Expiration windows. A 30-day clock on a requirement that now takes 40 hours of play instead of 25 is the quiet killer. Check whether the window moved when the weights did.

The number that should worry you

If a bonus advertises 97.3% RTP on the slot you're clearing it on, and that slot is the only game at full weight, your expected loss over $40,000 in qualifying play is about $1,080. On a $500 bonus, you're paying roughly $2.16 in expected loss for every $1 of bonus value — before you ever reach the cashout.

That math only works if you were going to play that slot anyway, at that volume, in that window.

Where this goes next

The open question is whether players start reading weight tables the way they read RTP, or whether operators keep shrinking the weighted menu until the advertised bonus and the real bonus are two different products. Some state regulators have started asking for standardized disclosure on game weighting. If that lands, the 30% haircut becomes a number operators have to print, not bury.

Until then, the bonus size is the marketing, and the weight table is the deal. They're no longer the same thing.