It seems to me that while this policy may make business sense for the sponsor, like some sponsors deduct chargebacks from the webmaster's commisions, the webmaster has sent a sale and it's up to the sponsor to retain the surfer for more than 4 hours. If the surfer cancels within 4 hours it should be part of their business expenses. I don't know how many other sponsors have this in their terms, but since they put it in theirs maybe there's a problem with cancellations within 4 hours? Plus if there's a serious problem with downloading huge quantities during trials, the trials can be setup to only offer limited content.
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