Live service
I heard Genshin Impact is a live service game with lottery style RNG, and Fear Of Missing Out, mechanics. A freemium business model similar to Pokémon GO ( my wife was part of the original beta test ) and Empires and Puzzles ( my wife has played since v1.2+ )
So I strongly advise only Free 2 Play
Cosmetic, and power up, honey traps built into the business model will easily support the game without you needing to financially contribute
As a small business owner I think it is a brilliant way to rake in cash which pays back investors, buys capital investments and hires high quality talent
RNG/ Paywalls
As a game designer, modder, tabletop RPG GM/ DM, game forum moderator, the thing I hate most is the core tenant “95% of all high level content will be only available to 0.01% of the players”
Ethics
As an student of probability, history and ethics, I realize it is extremely hard - though not impossible- to get super rich without crossing a lot of ethical lines
Highly, profitable Gacha is usually implemented as unethical. Do not get me started on real life landfills and discarded Magic The Gathering basic lands
One gacha costs players $ 68,901+ USD for a 99 out of 100 chance of getting the highly sought after limited time hero Gravemaker. Another gacha costs players $ 19,892+ USD for a 99 out of 100 chance of getting the highly prized, limited time, 100% IV, shiny, Rayquaza. So for every 100 paying players who spend $ 15,000+ USD chasing Gravemaker, or 100% IV shiny Rayquaza, at least one will still fail to get the desired outcome
Ethical business uses of probability - various forms of insurance - are difficult to find. Marry into / join the US military and discover USAA insurance ( avoid the banking ). USAA dividend style insurance used to be significantly more common
Modders
Lately I have gravitated to games that encourage a modder community like Stardew Valley ( currently too poor to make mods for Skyrim or Fallout ). This not only encourages super fans, but hundreds of super fans / modders can prioritize changes, and updates, that are not business friendly but are player friendly
This is similar to right to repair ethics
100% Content
Lately I have heard Psychonauts 2 has an invincibility mode that intrigues me
100% content available to 100% customers
I love games with super granular difficulty setting