He's basically asking for information on who he should contact because of that, since he didn't get any replies from Epic yet. Comments are mostly people being shocked.
Let's see what happens 'til the end of the day, or next week.
when they bought out Mediatonic they acquired the publishing rights, which is allegedly when he stopped getting royalty payments here. it also changed what platforms you can get the game on--previously it was available on a few other platforms--but these days you can only get the game on Epic or Steam
To be confirmed, but this sounds a bit like how Disney decided they didn't need to pay any more royalties to people who wrote Star Wars novelizations and original novels.
Like, "you don't have a contract with us, you had one with George Lucas before we bought Star Wars, it didn't transfer." Very shady, and probably a lot easier to pull when you're a huge corporation against a small creator.
From Wikipedia, Mediatonic created the international remake of it, which presumably included some kind of licensing fee from the original developer, which this tweet implies is at least partially based on number of sales. Seems like someone involved in contractual obligations at Epic dropped the ball on at least this game.