What do you think about trading PTC sites?

Do,you mean trading or swapping referrals for example i'll go to your site or profile and view your programs and if i like any of them or don't already belong to one of them then i may join under you in turn you would do the same for me...is this what you're talking about?...As far as a site turning out to be a scam site or a site that goes belly-up thats just one of the setbacks of online earnings...