Yes, I prioritize the allocation of resources on my servers. The feebie sites (ones which don't put a nickle in my pocket) get to be low man on the totem pole so the money maker sites can still keep running when activity peaks for one reason or another.
This site is not even on the radar screen for paying it's way anytime in the foreseeable future.
Now I am not running a bargain basement server, either. Both of them are dual Xeon processors and are still top of the line as far as boxes go.
But sooner or later I can see that FaunaClassifieds is going to need it's own server. Either that or I just move all of the freebie sites onto an el cheapo server that costs much less to lease every month.