That the communication with MongoDB crashed and left a sour after taste I can imagine. But the fact now is that there's a deeply flawed SSPL out there, OSI's only real public statement is very dismissive of it. It does not address at all the concerns of Elastic or MongoDB, painting them as some sort of bad guys, when in fact their products have always been open source, even when they were so valuable they really didn't need to be.
And the companies that drove them away from what OSI considers open source, are OSI's two biggest sponsors! Two sponsors it is worth mentioning, who built their products entirely as proprietary closed software, on top of open source software.
So now, wether they meant to or not, OSI has profiled themselves as defenders of proprietary platforms, making no effort to acknowledge the plight of open source companies, and lost credibility to such a degree that now again one the great open source companies has dismissed their approval and went for an unapproved license.
If the OSI was really serious about the "greater good", they would have worked with the FSF and helped MongoDB, Elastic and Redislabs defend against proprietary platform companies such as AWS and Google with an AGPLv4 that has the provisions the SSPL introduced without causing the concerns other people raised in this thread with regard to (possibly intentional?) vagueness around what does and does not need to be open sourced.
If that had happened, then maybe today Redislabs would have announced their switch to an OSI approved open source license, and the OSI would have retained its legitimacy and reputation. How many great budding open source/open core projects have been inspired by the success of Redis, MongoDB and Elastic, that now will consider the same path as these companies, or worse, that of Hashicorp?