The reality is that nobody's learning much useful from Free ESXi, as you need vCenter for any of the good stuff. They want you using the eval license for that, which gives you the full experience but only for 60 days.
Still, there's a lot of folks running free ESXi in labs (home and otherwise) and other small environments that may need to expand at some point. They're killing a lot of good will and entry-level market saturation for what appears (to me at least) literally zero benefit. The paid software is the same, so they're not developing any less. And they weren't offering support with the free license anyway, so they're not saving anything there.