I know at one point my putter pal had stopped counting down right around 60 hits left. I only used it when I played at work and would turn it off at home.
Then one day I went to turn it back on and it was at 0 hits not the 60 something that was there the day before. I just figured they finally caught the bug and didn't bring it up due to the fact I knew I got more than my amount of hits out of it. ;-)
I did report it as a bug though. Maybe I'll try buying 10 hits and leaving it off just to see. But since I made a template for my work computer I haven't felt the need to buy more.
They must have known players would just make their own using the putter pal as a template. Now I'm back to using avatar movements combined with an index card.