This was a targeted promotion from Speedpass where you got a bonus 100 points until the end of July everytime you filled up with $30 or more.
I got the offer, but my wife didn't. She uses more gas than I do, so we swapped Speedpasses for the offer. Only got 700 bonus points through the offer (a little slow in giving her my SP). Still, helped me crest the 24,000 point barrier!! I'm in the big time now!!!!!