McAfee says so much ... It's hard to believe. The rumors about advertising for money are very strong. I guess he did not oppose it. I do not take too seriously what he say.
You are right. Its to good to be true. One of the lessons I learned in the cryptocurrency industry is never listen to some of their advice from these kind of people, even though we know they are quite good in the technology or somehow they have their own specialty or genre, just like Mcafee known for his security industry contribution to the society, because at some point, they are being paid for their words. They never spread so easily words without any payment at all. Example when they actually advertise some coin. But if you do have some mentors whom you knew and helps you all the time without any reward in need, make them as a friend and thank them. But McAfee, nah make him friend but never take his advice.