.Renting L3+ on miningrig rentals seems to have gone well consistently getting paid more that on Nicehash but it does need some input to get best out of it. I have not used their auto pricing option.. I have manually priced mine at about 5-6% higher than Nicehash 24 hr average most of the time apart from when short term Nicehash was paying out considerably more short term( it does not last long). So my rig gets rented, I set the price high for next rental and check back to adjust it when the running rental is over.
Overall my rig has been rented out for most of the time but it was not set and forget to get best out of it. When my second L3+ arrives I think I might try to use different payout addresses and auto payout to see how it compares.
There is the graph showing rented times in yellow.