I moved 3 domains over there last week, but so far have no idea what the market of people looking to lease domains is. One observation that I do have about leasethis.com is that the majority of domains they have for lease looks like the majority of what you see on sedo.... a few gems among a sea of junk.
I hope they can make it work, as I think in theory leasing has lots of possibilities and potential with domains valued at over $x,xxx or even $xx,xxx But listing anything with a value under that defeats the purpose. Why clutter up a site with junky domains listed for $20 a month that you can buy outright for less? Makes no sense.
P.S. I just noticed you're from arizona. Hey neighbor!