> However Keith claims on his LinkedIn profile that he advised Arlington and helped him to be successful even initially he did not believed in TC.

I've personally been present when Keith gave Mike advice about Techcrunch on more than one occasion (and I was only over about 1 week every 6 or so, so it'd be odd if I caught their only discussions), so while whether or not he did enough to justify calling himself co-founder is something I don't want to wade into as I simply don't know (and is trying to keep my personal opinions out of this when I don't have first hand knowledge), I for one was an eye witness to Keith advising Mike more than once (whether or not Mike took on that advice, or whether or not it was good advice, I don't want to try to assess).

There's a huge difference, especially when he's using that fake reputation to deceive naive people to invest in some scam ICOs.