Honestly I dont get how their model is going to work... Usually they'd need to give at least something to f2p players and low spenders so they can keep progressing but at a slower pace.
Like that they'd stay in the server and be food for the heavy spenders or at some cases maybe succeed in progressing if they know what they are doing or if they join some big clan.
The way they are doing it though... I feel like everyone is going to quit in a couple weeks unless it is someone who can comfortably spend a fortune. And then the server is just gonna feel empty
But this is just my thoughts anyway, maybe it will work out for them in the end