Apparently you didn't read the first sentence did you? My first sentence was didn't you originally release this game for free by the name of extra life.... Then I went on to say that it's not the case then this game has been stolen.
Yes and no. They could do what Runey (hotel harem) does. Basically offer for free but ask for donations. If the creator of this game doesn't get enough he can always say, due to fund shortages I am unable to continue this project. Or even offer patreon the game 30 or 60 days sooner. And extra art work. As an incentive to join patreon.