I really don’t think it’s a protest on the part of Minecraft anyway; what they were really saying is that because subs were no longer enforcing rules and content moderation wasn’t happening anymore (or was being actively discouraged) and porn among other things was becoming more prevalent on the site, they didn’t feel comfortable having an official affiliation with Reddit, even if it was only with one sub.
The protest worked in a way, but I wouldn’t give Microsoft credit for actually backing the protests.