How close are you to AC? Not uncommon to have crappy offers if you live fairly close. They've trying to prevent someone from 'stopping by' with a large freeplay offer and burning them.

If you live far enough away so they assume you'll have to spend the night, freeplay offers will generally be higher.

If you and I both play the exact same amount but you live 5 minutes away and I live 400 miles away, my offers will be better.