This is not what they're concerned about. They're trying to establish a brand independent of the currencies and the blockchain itself. If you post the logo in your Steemit post, no one's going to come after you for trademark or copyright infringement. It's only if you set up a Steem blockchain service that is outside of Steemit.com while using the new logo, they'll have you in court faster than you can say Bitcoin. I'm not a lawyer, I'm just some guy. But I understand what IP owners are after. Basically they don't want you to impersonate them. Don't do that and you're probably good to go.