As an experiment, I visited
Prosoft/Drive Genius to see what cookies would be bestowed upon me, with
these results.
The top screenshot shows the 7 cookies that Prosoft placed, and the bottom one shows the 3 that reappeared 1 minute after the 7 were deleted and every minute thereafter when they were deleted (by my Cookie 1 minute timer).
I've now deleted all of my Prosoft cookies and set Cookie to preserve any that miraculously reappear.