Except of course the corporate folks who are licensing under AGPL who can and do then take contributors code and make available a commercial version that no one else is allowed to make available.

AGPL is a poison pill license that creates a very distorted open source model - better example is "shared source" - you can look but can't really use it in you own ops.

The whole AGPLv3 / GPLv3 thing was such a mess - a big move towards trying to tell people how to use the code. I think long term GPLv3 and AGPLv3 die out.