OP mentions Medium which is pretty annoying but do know what irks me the most with them and many other premium platforms is that they seem to convert quotes to smart quotes when people upload articles making it impossible to copy-and-paste examples that people use.

I think Medium have even tried to stop people copying and pasting content without an account. That is so anti-internet. Most of the knowledge I have I got for free so the idea that somehow I should charge others for it instead of helping others to go much further than I ever could.