In 2013 what you could do is open customs up for a limited time and also limit the amount of customs available. For example, for the New Year's Sale you could offer customs but ONLY for the first 10 (or whatever number you want) customers. It's similar to how Androtics sells pheros.
So let's say you limit the number of custom orders to 10. BUT, since FULL Custom orders take longer to make, you have it so that they count as 3 orders (not in the cart, but in the count). So if 3 customers order name embeds, but two order full customs (single stage) then that will mean only 4 custom orders will be left available because name embeds = 1 order and Full Customs = 3. I imagine a six stage name embed also takes time so those could count as 2-3 whichever you prefer.
To make it fair, you would have to open the window for custom orders at a random time perhaps seperate from the start of the New Year's Sale.
So let's say you limit the number of custom orders to 10. BUT, since FULL Custom orders take longer to make, you have it so that they count as 3 orders (not in the cart, but in the count). So if 3 customers order name embeds, but two order full customs (single stage) then that will mean only 4 custom orders will be left available because name embeds = 1 order and Full Customs = 3. I imagine a six stage name embed also takes time so those could count as 2-3 whichever you prefer.
To make it fair, you would have to open the window for custom orders at a random time perhaps seperate from the start of the New Year's Sale.