Whatever was really happening in that incident it seems clear that it was not a simple matter of having registered some domains with Cloudflare and then getting a shakedown for $100k+ because of that.
If anyone else chooses to read the post then I suggest skimming the comments (that are mostly hidden by default) as well.
The point isnt the apologists that pop up whereever CF gets mentioned, the point is that they more or less have a built reputation for deceptive loss leader marketing.
Maybe early/MVP product engineers should know better, but CFs own education materials do not teach you to expect that.