Give them a weekly cap. So if I get a limited BPO of a Dragon Fly suit I will only be allowed say, 30 suits a week, after those thirty suits are used up I have to wait until the next week for the suits to replenish.

Balancing factors:
For the sake of balance you wouldn't be allowed more than two limited BPO's of the same item on a character. Also the amount of items would not carry over to the next week, so if my BPO gives me say 10 suits every week and I don't use them for three weeks, I would not have 30 suits I would have 10 as the amount resets each week nomatter what.

For trading... You would not be able to trade more than two BPO items a week. This is to prevent people from transferring BPO items from alt accounts to their main every week.

How CCP can continue to make profits
After the initial quantity of BPO items are used up, give the player an option to buy Aurum equivalent items. We all know that people will blow through suits easily enough, give them the option to buy items and getting them immediately as opposed to waiting days will be a huge incentive to buy Aurum items.

What do you guys think? I wanted to get players to work this out before making a mess in the feedback/request section.

So comments? Questions? Support?
I would appreciate it.