I got a $50 credit for joining by a specific date with my store account. Nada for my non-store account. As usual, eBay promos are targetted. If you're not a target, you don't get the promo.
It's entirely up to you how you take it. If you've signed up for MP, you have got what you're going to get. If you haven't, you will probably not be able to sell. I won't be signing up with this account, so I can give you more objective evidence in 11 days.
