entice you to play by offering ftp, but deny you access when you try to log in. you'd be more desperate to want to play 07, leading you to buy membership. end product? Jagex earns more $
Real knowledge is to know the extent of one's ignorance.
I'm pretty sure the F2P worlds on OSRS even though they're for P2P players just mean that you can't use P2P items, so it's like oldschool f2p rune pking.