There is that, too! But to be fair, there are many thousands of users and they have no real way to communicate with all of them or to know who they are.. I think the steemdev discord rooms might be the best way in to communicate - or github.. However, I rarely get replies from anyone at steemit on anything anyway.
There are 22 results combing back in the 'created' list for the tag I created for my witness posts - so I'm not so sure there's a numerical limit: