Have you checked your own curation apr? I doubt you are above 9%. To get that 10.19% you need to be one of the first to vote posts that will get late votes. I believe I do a good job curating and I get about 8.5%.

Also remember that the price shown on that website for the lease is what the lessor gets, including the apr. The lessee pays for the cooldown days, and the apr paid by the lessee is much more then what is shown in that website.

When you lease, you are paying a premium to get popularity/influence in return, or you can call it give a nice upvote to your favorite authors, I agree it's also a win. But it will never be profitable.

Leasing is also common in voting schemes, like self-voting (main and alts), or vote trading.