The big problem is that it trivially easy to make new tokens, and give them the appearance of a market with fake liquidity. I know people think Smart Contracts are a real innovation, but 99.999999% of the time they are just used to make more crappy tokens.
Crypto advocates say it’s security comes from the network effect of all the nodes working on extending the blockchain, but that security is of little value if it enables scams on higher layers.
In particular, it’s just lazy to escalate to a permaban right away. Even if they have a rule against reposts, removing a post along with a warning not to do it again is sufficient to educate the vast majority of people there who may not have seen the rule and only did it for the first time.
But that would take a few extra minutes, I suppose, to check someone’s post history and see if they are a serial rule breaker. Much easier to just wield the ban-hammer then ignore.