Lol. Did McAfee call you and made a deal with you? Just like many of the members here promoting all kinds of projects and sites, John McAfee is also just promoting projects that pay right. John McAfee have shilled for many altcoin projects in the past. I don't think he would do that without any amount involved. Did you buy one of the coins that he tweeted? Don't jump into it. His words cannot cause hype anymore.
If the OP met Mcafee in personal, I would say that they had an agreement but if he just saw a Mcafee from telegram, it was a bait. John Mcafee is a celebrity and a well-known cryptocurrency promoter. He successfully promoted a large number of ICOs and I am pretty sure he will not shill anything because his name might be burned.
John Mcafee is a real crypto knowledgeable person so if the OP lose something, I think it is not anymore the concern of Mcafee.
The name John McAfee is not as reliable as you may imply in your post. If you think John McAfee will not shill anything because of his name, then you are probably mistaken. And if you take a look at this man's words relating to cryptocurrency, you will see that he has already shilled many projects, not just Bitcoin but a number of altcoins also. John McAfee is of course a knowledgeable person but is also a man who says before he even thinks.