On the home page of the website https://ubuntu-mate.org/ there’s a small screenshot gallery.
Of the 7 images, only three actually show what the desktop is like, and those three all use the standard theme.
One of the things I like the most about Ubuntu MATE is the extent to which customization is possible, and sure enough we have a rather full “Screenshots” section here on this forum.
But who reads forums amiright?
Proposal: A secondary gallery on that front page (a link to the gallery would be fine if overloading the page is a no-no) that is fed from the various community-contributed screenshots on the forum!
That way prospective recruits could take a look and go like “wow this looks nice!”