I will recommend having a shop with custom esthetic assets; not loot boxes; or at least, not loot boxes bought on the game, if you earn the loot box playing is welcome.
Ads in-game must be very well done and right now there is not a real company connecting big clients with this can of solution to be integrated into a game. Hope in the future there are some good solutions for that. (I always loved “syndicates wars” they have an ad for the “Gosht in the Shell” movie)
Also, the season system is really nice, you get access to some extra live content and you pay for it. of course, people will only do that on games they love, but depending on the case seems better than DLCs.
about Kickstarter or other donations, if you are clear that the donation is to your company to support your company projects should not be a problem. It is true that from my point of view, I will be clear, with what use will have the money.
In any case, all this is just a personal opinion, take it with a grain of salt. 