Anyone know the current conversion rate from plusses to likes?
That depends if one is on tapa or web.
Likes are truly priceless on Tapa.
But on the web it’s easy to just click likes away (though limited to one per post, with some noted exceptions), while giving pluses requires replying, typing, and in a highly active thread verifying after additional replies were posted, so given the greater effort they must have a lot more value.
Then OTOH likes have been a major contributor in eradicating world hunger, no evidence of such a benefit from plusses.
Try to check the points value thread for answers.