BTCPOP is 100% "NOT" a scam!
I have been a member there for well over a year, I have taken out several loans, and I have paid them all back. I have also invested in several of the IPO / share opportunities there, which is what is mostly used for collateral when asking for loans.
The site was taken over by Cas almost a year ago because the old owner was about to run off with a LOT of peoples money (his name is previously mentioned in this thread). Long story short, BTC Pop is NOT a scam. There are several members there that tend to make up the majority of the investments with a larger amount of people who also invest smaller amounts. Withdraws work, which was NOT the case when the previous was running the site, however they are manual. Cas does them himself, at least BTC withdraws. Alt coin withdraws are automated I believe.