Since original post is deleted I can only the content of the from paste.ee link. So the tweet in question was ..
Dear @ElonMusk, Bitcoin is a new option for Money and Gold. Bitcoin is what started Crypto. Mining gold and printing money uses fossil fuels and is environmentally unfriendly. Reconsider #Bitcoin #Crypto
If the user is banned because of this tweet related bounty I strongly believe there must be some misunderstanding... even the tweet itself is very polite and to the point. It's not bullying or targeted defaming. It's a simple fact and related to bitcoin marketing. Not much different from any other bounty requesting to promote a service or a twitter account of exchange etc.
I guess the user in question deserves proper explantion for his ban... after all this will help the other too, if there is any hidden rule which we are missing.
Regarding the other rule for BTC/LTC payment in Game & Rounds clearly make sense and this should not be in altcoin section. Dust payment is not an issue of bitcoin, bounty owner should know this by default and setting the appropriate payment amount considering the dust is part of bitcoin giveaways.