The ATF likes the POC states, because they claim that the states have access to more information and can deny folks who would otherwise pass the NICS check. I'm in Tennessee, and I think TICS does a lousy job. Despite a squeaky clean record, ever since a guy with the same date of birth as mine and a similar (but different) last name got convicted of a felony in New Jersey, I've been denied 4 times. My appeals get the denial overturned within a day, and once TBI even telephoned the dealer before I left the store to tell him to go ahead with the sale. But it is still an embarrassing hassle, and one I have to pay $10 for each time. Tennessee has one of the highest--if not THE highest false positive firearm background check rates.
Also, state law allows for a fee of no more than $10. Naturally, though I know it doesn't cost Tennessee nearly that much to actually do the check, the TICS began charging the maximum fee allowed since its inception. It will never go away; it generates too much revenue.