I’m the author and maintainer of this site/tool. There are definitely people creating and downloading expression maps there. Some people seem to have put quite a bunch of work into it. But no one seems very eager to share them. Perhaps expression maps are just less shareable than I thought they might be.
(To be fair, I’ve also had some requests for enhancements that I haven’t gotten to yet. The most useful is probably a way to share non-standard presets along with associated expression maps.)
Ok! I tried to apply, put an email address but never received the message to activate my account. So i didn’t go further in my investigation, apart from the message here