time and effort before you give up?

I would always give a site enough time at least to reach the payout and see if they at least do pay. If I have found the site fun to use and enjoy it, I would stick with the site. I think the best kind of sites are the ones that don't feel like it is work. Sometimes I have neglected other sites when I find a new one that I like.

I depends on my impression of the site. Sometimes I give up pretty fast for instanse if the site has a lot practical problems. I have joined a couple of PTP forums in the past, and it has happened before that I have given up after writing a few posts, simply because I realized that the topics weren't right for me and that I didn't know enough about the topics to write about them. If I hear that many people are having problems with a certain site, with the payment etc I also tend to leave. Otherwise I usually stay until I reach payout.

If I haven't heard from friends that they got paid I only try to make minimum payout and that will decide whether or not I'll continue.