It was gonna happen sooner or later. MC and VISA has such a grip on the market and is the only payment processing service around, they tend to be able to go whatever they want without much consequences.
One of the games that I look forward to the updates. Wish the updates took a bit longer to have a bit more content but still a great game in terms of corruption genre.
Renpy and Unity are my favorite.
RPGM can be good depending on the game with some simple combat systems.
Unreal is probably the worst in terms how difficult it is to make a optimized game with limited resources. Almost all of them are bad, with maybe a few rare exceptions.