Steemit does not control the blockchain, RC's are for steemit. It is my understanding that Dapps will have to pay their own way on the chain. So if a dapp wants to create a twitter resteamer, then the dapp and dapp user are going to have to pay the RC cost of the posting. They have not been silenced it just that it cost them more to post. "I had eggs for breakfast. What did you have" with a picture of their breakfast.
RE: HF20 Update: Operations Stable