Oct 14 2015
Could you provide us with a list of api.php URLs for said wikis (at least the public ones)?
Over at DreamHost, we also have tens of thousands of MW users and it's our most popular Wiki software. I wouldn't be shocked to find out most people installed it on Shared hosting either and upgraded as needed.
Oct 2 2015
Influencing hosts. Have you ever had your hosts install extra software for you?