Older version of CCcam did benefit from a prio but these needed to be talior made to the packages you could view generic ones sometimes slowed thing down more and didn't help. The later versions of CCcam are said to not need a prio at all.
The providers just give the CCcam web interface or CCcam.info the ability to use more information so as passete said to see who is use what etc.
I don't think you'll gain any more stability using these files.