Kiyosaki has been giving the wrong advice to people in seminars for a decade, and look, he's still an idol, the stupid mofo advised everyone to buy real estate right before the crash, he successfully predicted every stock jump by screaming sell and there are still people dumb enough to pay to listen to him.
Yes, every now and then his name appears on BTT and people still take him seriously, which only proves that if you say
"BTC will be worth $2 million", you have an audience that will worship you not because you are telling the truth, but because of what they want to hear.
I see what you're saying but, then again, someone will still recognize him and point out what he has done in the past. He might get a few deals here and there but I doubt it would be something huge as before. About being the mastermind, he could pull that off for a time. At some point, there will be someone who will dig and expose everything.
Who knows, maybe we are wrong and the man will learn from everything that what he did was wrong and will continue with an honest life. However, it is very difficult for such people to change, not because they do such things only for money, but it is a kind of addiction to the excitement that comes from deceiving people and profiting in an easy way.
There's nothing we can do if such people don't bother search his name on google search, which currently shows about him plead guilty or involved on ponzi scheme. Although it's different case if he managed to change his legal name in legal manner.
If you have enough money, you can change your appearance, not just your name. Such people usually manage to create a secret stash that awaits them when they get out of prison, and I sincerely doubt that this is not the case here.