Because iGO_Tech managed to come to an agreement with the Coinsbit exchange where he got refunded for a coin listing. Part of the agreement was to remove everything negative he'd written about Coinsbit, which was pretty much all of his posts. If you look at SinbadGuthrie's posts, they have nothing to do with Coinsbit.

I don't understand the connection between Trade Runner, iGO_Tech and SinbadGuthrie -- perhaps they made an agreement to include each other in their trust lists. It's bizarre to think Trade Runner and SinbadGuthrie are alts as they frequently talked to each other, though it wouldn't be the weirdest thing I've seen.