This guy must live in fantasy land.
"Don’t be greedy, please. Even if you only put $1000 per month onto this Amex card, you will earn 60,000 Ultimate Rewards points! That’s a lot! If you use this trick in moderation then you should be safe to earn huge numbers of points, year after year, without fear of bank retaliation. If you go too far, you will get shut down. If many people take this too far, the whole deal may get shut down."