Why do you need to play on slot games that increase RTP while the potential max RTP on this slot games is still the same on the base RTP of other slot games. The progressive part on RTP is just misleading you that the game even better the more you play but in reality you will lose a lot in early games due to low RTP until you have a better RTP while you can enjoy a much a higher RTP on all of your games by playing initially on high RTP slot games.

Metawin offers a max RTP to all its slot games according to their previous announcements which you can find here https://bitcointalk.org/index.php?topic=5483159.msg63824122#msg63824122. Playing on Metawin will guarantee that max win is always possible since the RTP is max compared to other casino.