In a town in Ohio I used to live in, the answer was 50. There is a law on the books that says its a misdemeanor to lap over 50 times in a day.
Edit: I was slightly wrong - its 100 times in a single session. Source: https://www.onlyinyourstate.com/ohio/crazy-laws-part-2-oh/
I think the real reason is so that the pockets dont get snagged or deformed while a product is being transported / stored / displayed prior to being sold.