FYI: there's a huge thread on SlickDeals about the eBay Groupon deal. For those of you fishing for referrals: by all accounts it appears that Groupon will not be giving any referral credits in conjunction with this particular deal (they've pulled this same stunt in the past for other incredibly hot deals), of course only time will tell for sure.

Despite what the T&C's say it is definitely possible to buy multiple eBay GC's, in fact there are reports on SD of individuals buying literally hundreds of them. Among other things this involved buying Groupon gift cards and using them on new accounts (thus negating the need for a new credit card) but Groupon has since temporarily disabled their gift card function, in addition if you have a credit card that allows you to create virtual credit card #'s that works too.

Finally keep in mind that Discover Card's shopping portal currently gives a 15% rebate on Groupon purchases and Mr Rebates gives 6% back.