All of the games are built on the same foundation, with the exception of skin colour and weapon design. High game entry fees and a high learning curve for new users are discouraging new users from joining the system. Because of the unique teams they have, only early adopters are making a lot of money. The number of unique users registering each day is decreasing, indicating that the hype is fading.
Exactly.
They are essentially thinly veiled ponzi schemes that have no real product and riding on the hype that has been generated over the past year or so under the umbrella term "P2E".
Definitely don't think that the bulk of them are going to be sustainable for the long run. I think that it is a matter of time before the capital inflows stop, and the ecosystem mostly collapses under its own weight.