I noticed on a few reviews that some providers still charge for multiple pops.
One in particular had the provider charging $50 for multiples and the reviewer actually referred to it as a sensible pricing structure.
http://www.eccie.net/showthread.php?t=536378
I personally have never come across this issue but why exactly would this practice ever be deemed acceptable to a monger?
Are we paying to pop or are we paying for an agreed upon amount of BCD time?
If we are paying per pop then there should be no clock. Whether it takes 10 minutes or 2 hours to pop you should be charged the same.
If we are paying for reserved BCD time then whether you fail to pop at all or pop 4 times during the allotted session time you should be charged the same.
Seems logical to me.