This is data for different GEOs. It doesn't work that way, that a casino can spin RTP. When we were collecting information for casinos in the UK, we were surprised that RTP for these GEOs was greatly underestimated, that is, in fact, there are other machines there (technically). This was done, as I understand it, to account for the 22% tax in favor of Great Britain. The table is working, but you need to google the info (write it in PlayNGO, for example), and not throw it on Curacao.
It is worth checking those geos where casinos are required to obtain a local license. For example, if you want to work offline in Germany, you cannot put any RTP on slots except 70%. The German government is confident that any RTP above this value causes strong addiction.
In the casino on the UK, for example, all purchased bonuses will soon be removed, since this function is also considered to be highly addictive.
Curacao, Malta, Cyprus, etc. (licenses without reference to a specific geo and without paying taxes on players' winnings) are the most profitable for the player, since the provider sets the maximum RTP values there. It is implied that if there are no additional taxes, the model works at the highest payout values. The predatory conditions of Qiwi and Yandex money are not taken into account here, but providers classically do not care about these gray markets.
Playingo has many highly volatile slots. Players who knocked out x5000+ from the first or second deposit do not have the feeling that the RTP does not correspond to reality. Since other players pay for such large wins, they have such a feeling, etc. This is exactly what high volatility is, the RTP value is secondary at short and medium distances.
I've seen enough of the previous 10 years over the last year

Well, this is an example, the numbers may vary. It could be from £20 to £40,000 in some reactunz, etc. The point is that the player didn't have time to put money into the slot, and he takes off a large total multiplier relative to the deposit amount. And there the RTP value goes up to 1000%+
In the short and medium distance, you can see both 10000% and 25%. That's why everyone plays in casinos. A slot with 90% and high volatility will be dozens of times more popular than the same Bloodsuckers with 98% RTP and low volatility. In my opinion, it's a shame that providers publish these parameters openly. It only confuses players.