I am also a member of "PaidViewPoint", and I must say, I am very disappointed with this site. What first attracted me to it was the payout threshold of $15, along with 72 hour wait period. However, if I could do it all over again, I wouldn't have joined at all.
When I first joined, everything was great. I was receiving around 3-4 surveys a week. The overall price was low, but I figured by completing that many surveys within a week, I would reach the threshold sooner than later. Then, around my 3 month of membership, surveys just stopped coming. I was checking daily by that point and every day, no new surveys. I emailed them, and to my surprise, they emailed me back with 48 hours. Unfortunately for me, the response was, "make sure your profile is updated and you should receive them" (paraphrasing, of course). Maybe a week or 2, I received a survey. Now, they just seem to come periodically, but I still check daily to make sure I don't miss any. It's all very disappointing.
I don't believe it is a scam, because from what I see online, they are paying. It does seem a bit unusual, though. Like I mentioned, I do still participate. My account is sitting at $14.65; after reaching $15, I can guarantee you that I WILL BE DELETING my account.
All that said, sorry to hear that others are experience the same issues. Anybody thinking of joining, I would NOT RECOMMEND it!!!