I would strongly recommend that you don't use fastpic.org as an image host as it is a bit of a **** take when it comes to pop ups etc.
That site may well work its way onto the ****** list in the future because nobody wants to be subjected to that kind of **** just to view an image in a bigger size.
It wouldn't be so bad if it wasn't such a small preview image. Surely they offer a bigger size thumbnail than that? If not, they really are just in it to get clicks and ad revenue.