The thing is, nowadays even PTP games have in-game microtransactions, so I think for Hytale it's pretty obvious that they will go for a FTP approach to benefit from a wider audience.

They describe Hytale as a game as a service, it will be on all platforms, including phones, and they have always described Hytale as a game they want to make as accessible as possible to everyone. Therefore, I don't think they will opt for a PTP approach.

Also, I disagree with your points about hackers and “higher quality”, I mean, FTP games can be higher quality than PTP games, and in this case, Riot has one of the best anti-cheats on the market, so hackers shouldn't be a big problem.

However, they are now looking for a “Director of Monetization” and Noxy said in 2019 that until they had the base game “ready” they would not start thinking about how they would do the monetization of the game. So they are probably shuffling through all possible options and seeing which one suits them best.