i doubt deleting would have any effects in the short term. You think an algorithm isn't smart enough to pick up that you had it in recent history? If I were evil enough to write this pricing algorithm, I would put all premium credit card payment methods accounts all in one bucket on day 1 it's uploaded into the account. Those customers have already shown they're willing to pay to play for something...even if they remove, I would write an algorithm to track to see if their habits/patterns indeed warrant getting kick out of this group.