I'd highly recommend that no one participate in this research until we have more answers. It's generally bad form to require participants in online research to request a link, and and it's very unusual to post in a privately-owned forum without a statement of approval from the owner, so my antenna are on alert here.
to the OP: I've done research on online communities, so both me and my students have been in your shoes before! Some folks over on deals.woot have raised valid concerns about the purpose of your study, what data you're collecting, and whether/how confidentiality and anonymity will be protected.
If you could post your informed consent, that would answer a number of those questions.
If the OP is unable or unwilling to post his/her informed consent statement publicly, that's an enormous red flag.
(crossposted with the OP's post on deals.woot)