I've seen too many shill accounts promoting genesis mining and they all have similar grammar. Most accounts were created in beginning of may and have low activity ad 1/2 of their posts talk about genesis mining, and they even put in a hyperlink but no referral. That makes me suspect they have employees making shill accounts on here to promote their "business". Whether or not it is a ponzi I cannot say, but it is not profitable even with their new rates.
I noticed that too, although I do not think it is Genesis Mining, but a user that likes to have 2 or 3 usernames, or it could just be people that can not speak or type English very well, and perhaps Google Translate, or whatever translator they might use, converts their text in a way, that it will look very similar in style.
I am quite happy with using GM at the moment, yes, my payments have been going down, which will be the same for everyone, but because of people using my referral code, I have been managing to do ok so far and will easily reach my ROI.
They did do a signature campaign last month, that users here could take part in, could have been why there were a lot of Genesis Mining signatures around with no referral, but they were mostly for users that had long standing accounts already. The campaign lasted a month, but will post the link if anyway wants to peek.
https://bitcointalk.org/index.php?topic=631729.0