Interesting. But was it ever developed commercially? I can't find any consumer products actually using the counter (either for rental or for lock/jam-after-certain-plays). But that could just be because I'm using the wrong search term - I imagine that there is a brand-specific term and searching "VHS tape play counter" isn't helpful since all the results are for either repairing VCRs, or for accessing the tape counter functionality in the VCR.