Can you make changes to the blockchain code? You can't. Steem/Hive are mainly open source projects, but many solutions built around this are not. Hive has a community that has a lot of skills. If someone fork a hive/steem today it doesn't mean it stops being a shitcoin.

Shitcoin

Coin

Hey you still haven't answered the questions. In the answer to them hides the answer why blurt is shitcoin