It may be him as they are both active in the Russian section and the user you mentioned posted in the HybridMixer thread as well.
I'm almost sure that he was the one editing the signature campaign , as all users were "anonymous" except him which means he was the one editing (from my experience with Google documents) , correct me if I'm wrong.
Yes. And the same registered time as shotev...
shotev - April 11, 2016, 09:51:23 AM
bitevil - April 11, 2016, 09:40:56 AM
These users are evidently two different persons (though affiliated in some way, maybe friends). Shotev's Russian is terribly broken at times (with a lot of spelling mistakes which native speakers usually don't make), while bitevil's language is a fluent colloquial, the one you would expect on a forum like this...
Go on reading their post histories