They advertise on facebook and show images of hats, gucci handbags and so on. That in itself is false advertising. It is based around a mailing list and they also send tons of advertising to go along with their freebies. Who knows what else they do. I don't trust them one bit.
Also...and I bet you didn't know this. The site is owned by an American individual or company. How UK is it now?
You are best off going to somewhere like freebielist.com at least they are ethical.