This is me. I have been in the beta for almost a month now and not gotten any sponsors. I have talked with many in the JS community who have proof of this (https://github.com/feross/funding/issues/15#issuecomment-524...).

"Unfortunately, since it's opt-in it didn't move the needle at all. I think it directed a few hundred dollars to Sindre's Patreon. But that was it."

I am currently looking at TideLift to see if there that is a more viable option. But to your point, it might all be "way too little for the effort required".

EDIT: adding my link since I guess that is what others are doing in this thread. https://github.com/sponsors/wesleytodd