Having an unlimited plan is a great way to attract a small group of users, but it can backfire (as you're discovering). What percentage of your users are on the

Having an unlimited plan is a great way to attract a small group of users, but it can backfire (as you're discovering). What percentage of your users are on the unlimited plan? As other posters suggested, you might consider replacing the unlimited plan with something more sustainable and less open to abuse (for lack of a better word). You'll have to weigh that against the revenue that you risk losing by alienating some of those power users. But if it's only some users, you might be able to afford losing some or all of them.