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I use my main sign in with it. It seems pretty safe. It's what you normally use when you use bots. Have you ever signed into Dtube or Dlive? That's how I sign into those as well.
I was nervous at first to use it but I pretty much had to use it to use https://steembottracker.com/

Yeah, I'm pretty scared to use the master key in another website. But steemit.con and steemconnect.com are from the same owners?

I think different but not sure.

I use my main sign in with it. It seems pretty safe. It's what you normally use when you use bots. Have you ever signed into Dtube or Dlive? That's how I sign into those as well.
I was nervous at first to use it but I pretty much had to use it to use https://steembottracker.com/