I listen to Morning Edition & ATC every day and I don't even recall hearing Leaf et al mentioned. Lot of good that sponsorship is doing them.
The one I always wonder about is Sodexho. At the end of their part of the bumper the announcer says something like "On the web at sodexhousa.com". He doesn't spell it. How in the heck is someone supposed to guess the spelling of that URL? I just had to look it up to check and I already kind of knew something about the company.