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.Max win is always possible in any casino as long as the casino is trusted and as long as you have luck regardless the RTP applied by the casino.
Having higher RTP does not mean that we will have better chance to hit max win IMO, as Betwrong said previously that you may lose all your balance easily even if you play slot with highest RTP.
Some people even hit max win when the global live RTP is lower than its default RTP because they are lucky and some people lose easir when the global live RTP is 5-10x bigger than the default RTP because they have bad luck.
RTP never give any guarantee of better result so dont be fooled with RTP and make you force yourself to play more than you should.