Here's a practice that I did not know existed on the Tomarken PYL:
Until I saw a recently aired rerun on Buzzr, I did not know that in addition to the winnings caps of $25,000 (then later $50,000), there was also a 5-day appearance limit at play as well.
I don't ever remember seeing anyone being "retired" after 5 wins who didn't surpass the $25/$50K mark.