I'm the admin of mas.to. We didn't block in the moderation sense (suspend/limit), we just stopped delivery of content to kbin.social to prevent even more failures and retries piling up. It wasn't good for performance and probably not helping kbin.social either! I'll start delivery again on mas.to and my other instance!
I’ve just had to return a printer and the company asked me to print out a returns label. 😳