It will be interesting to see how that Mongo SSPL thing is going to play out with regard to forks. Mongo Inc is now basically trying to destroy the business of it's competitors in the hosted Mongo space. But obviously those competitors will not upgrade to a version with the SSPL. So they're stuck in a bit of a rough spot where if Mongo Inc continues to drive Mongo development eventually they'll be stuck with old code. So it makes much sense for them to band together and fork Mongo to continue development of a version they can use. If the SSPL is going to be regarded as a non-FOSS license (sure looks that way the way discussions are going) it's quite likely that outside contributions will move into the fork creating a very viable hostile fork that could kill Mongo Inc's control of Mongo. We've seen scenario's similar to this a lot of times, it usually ends badly for the company.