Im on the fence about whether this is accurate. There was an addendum posted somewhere in this thread that clarifies that non-html is just fine.
In reality Im in the same exact position you are and maybe I just want to believe this is something other than that. I dont see why they would care about the content. There has to be something else to this story.
I didn't deploy yet and this has me scared enough to get me thinking about an alternative. Time to spin up a new linode instance I guess.