I'll happily pay a sub if it means not being bombarded with micro-transaction offers every time I want to upgrade my inventory, bank space or that I can buy a mount with a reasonable amount of in-game currency etc. etc. etc..
If a game isn't worth a piddly $15 a month to play, then it's not worth my time to play for pseudo-free either.
I don't always drink carbonated Mexican rat piss, but when I do, I prefer Dos Equis.