Edit: the meme says “closed source” which is patently false for Mongo
No, MongoDB is closed source, proprietary software. You might be confusing open source with source available.
Edit: Actually I am wrong sorry. Closed source is not the opposite of open source. I didn’t read your comment exactly enough. MongoDB is not open source, it’s not free software, it is source available and thus not closed source. The things below are still true but don’t contradict what you said.
The SSPL is not a free software license and it is not an open source license. The OSI said so: