Editing a screenshot to push a narrative is pretty easy. I'm no longer with MongoDB, although still a big fan of the product, but I'm more curious as to how you could rack up a $2,500 bill just trying the product out, especially the serverless offering, coupled that with the guy being a "twitter investor", so that kicked off my BS detector.
MongoDB Atlas runs on the big 3 clouds, and of course you're going to pay more for a fully managed service, as opposed to hosting it yourself directly on the big 3, but racking up $2,500 in serverless compute charges in 24 hours seems very very hard to do, and especially by accident.