Fidelity's Fully Paid Lending Program

This is a topic not often discussed, and maybe little known. In a nutshell, if you hold individual stocks in decent amounts, these shares can be "loaned", probably to short sellers, for $$. You retain full control over them; they won't disappear, and will behave in your portfolio as they always have.

Since I buy and hold for fairly long term, I am tempted to give it a whirl. Has anyone made use of this? If so, and if agreeable, could you disclose the kind of returns this generates? Thanks.