I have to say - why did you give them your cell number? When signing up for _anything_ online - only give them information you want them to have. They have no need for your number, and thus shouldn't have it.
Besides - looking at that screenshot it is pretty clear that it is a crappy advertisement with nothing to do with photobucket. You don't click on pop-ups do you?
I don't mean to harsh but you should have sirens going off immediately if are ever told you could "win" something online - especially if it asks for _any_ type of information about you.
If you really are that upset with photobucket then send them an e-mail explaining how you feel their acceptance of a scammish advertisement upset you.