Eventually, I will start to have more important, real life stuff to do to play most games I currently own.
Realistically, it's going to be a yes. I can't say when I'll quit. I will probably just stop playing it or something. Although, this will be awhile from now. Blockland is a fun game, and it's not losing any of it's magic for me.
If I start getting bored, I'll just start going to different servers. If that doesn't work, I'll host my own server. After that, I'll learn torque and forget around with making add-ons, and then stop being a kid and get a job I guess.
I don't know how this works out so the whole subject is iffy. Although it's a definite yes; I can't play Blockland forever.