Well, ING is doing it again. This time, it is through their Sharebuilder accounts. Right now, if you invest $5, you will receive a $50 gift. They run this promotion occasionally. I signed my husband and myself up the last time it came around. It was very easy and once the $50 was deposited into my sharebuilder account, I just tranferred it over to my bank account. I haven't had to worry about it all since.
It was so easy and a great way to get $50 with no strings attached. To read all the details on how to do it, check out MoneySavingMethods.