Regarding the scammer impersonating tradeogre's staff, this individual (or group of individuals) is monitoring TO's twitter and targeting projects that enquire about listings via posts/mentions. Then he/she sends a coin listing offer email to the devs asking for a small fee to get listed in hoping to extort some btc from them. A close dev of mine asked him for a proof of ownership/identity (twitter or tradeogre official website) that he failed to complete. So, he just declined the offer and tried to contact "official" TO twitter, not verified by the way, but no feedback...
It's easier to find this scammers email than the "official" one and people could get easily scammed because the guy is persuasive and there is no way of confirming TO contacts. This scammer is using tradeogresupport@protonmail.com.