if you are a SaaS vendor looking at building software that uses MongoDB somewhere, you'd better get a lawyer looking over this license and how it applies to you.
This is becoming a bigger issue as the biggest SaaS vendors hide behind this clause more and more with incredibly proprietary forks. They offer very little to no actual core development or contribution and it goes against the previous method of GPL code getting funding.
It annoys me, as the legal headaches of contributing internal only use code back will block some companies from using OSS, but I see it both ways.
The startups who are doing a lot of the core housekeeping of NOSQL platforms are learning they can't find a business model. This is getting messier and messier.
Partially because there are just too any vendors involved.
What's amazing, though, is that a move like this took a customer who was very into MongoDB and using it in projects and was literally working with MongoDB's own hosted product and now looking to avoid it like the plague.
So at least in this one case, they are likely losing hosted product from this. And gaining nothing. I imagine a lot of customers going through this same process.