Hi @anyx,
Thanks for replying. You indeed covered the issue in the original post. However, I know Steemit is still in beta, but I don't fully agree with the 'No harm, no foul'. For instance, my first cross post got an immediate response from cheetah linking to the original article I wrote.

1. I did link the original article in my post (e.g. informing the audience)
2. I edited the article for the Steemit audience, so it wasn't a complete copy paste
   Now, I'm not complaining. I don't mind writing exclusive content just for Steemit. But in this case you state double spending of your "Proof of Brain" is ok.

In practice, cheetah as the first comment on your post on Steemit does feel like a foul and does feel like harm to your credibility. It hurts a little extra because people just see a cheetah comment on your post and they most likely won't click on the link to see that it is actually a link to a article you have written.