It's certainly caused a lot of confusion, particularly as casinos have been quite opaque in RTP reductions (often using cryptic messaging, broken webpages or other tricks to frustrate discovery). Simple enough when one slot design = one math model (and a reskinned version would be launched with the lower RTP) but now it's a lot messier when one slot could have 10+ configurations.
So when they say they don't control the RTP, they mean they don't influence the running of math model - they can (and indeed have) changed the math model to a different variant.
Furthermore the existing definition of RTP is becoming more of an issue:
- RTP is billions of spins by one player - this doesn't scale with an increasing number of stored value games where the realised house edge is higher than indicated because of all the abandoned climbs (or worse, perpetual stored value that is almost impossible to fully unlock - e.g. Monopoly Megaways)
- games that have increasingly absurd "perfect strategy" descriptions that it's nearly impossible to execute, which is not strictly a new thing (e.g. video poker) but having to read a multi-page description for that 99% RTP inevitably means people are going to make a lot of mistakes
I wonder if this would work better if all providers were required to report publicly the actual RTP, or a normalised actual RTP (to avoid excessive skew from the biggest bets) - something that I recall Microgaming used to do back in the day? It would certainly open some eyes if a 98% live casino game had a 8% realised take...