a person like me wont earn a cent, and after a while they will quit.

You pretty much say it yourself.

and I want to be certain than one day my posts won't dissapear because this failed.

Have you ever written anything on a blog, your own website, facebook, or anything else online?

• There's a risk of all those things going "puff".

Saying take it or leave is not the discussion I wanted to make with Steemit users

You clearly misunderstood my comment, but I'll take than on myself, for my poor communication skills.
^ If you don't think, that steem will bring any value to your life, then it's a waste of your time to be here.

• It doesn't matter, if it's money, knowledge, friendships, or what ever. If you don't think you get anything out of it, then it's not really worth your time, is it? And if it's not worth your time, you should probably find something else, that you see as worth your time.