Think about it this way. These rebills are already scammy as fuck, at $80/month. Double that and you have an extremely pissed off customer who most likely WILL be complaining and raising a shit storm. If the offers are from two different advertisers, its not so bad (still shitty), but if the same advertiser owns both offers he will have a hell of a pissed off customer, which threatens their merchant account, etc...