What he is trying to do is prevent spam and unintentional down voting of peoples post. A lot of the post are pulled via automation to the stemgeeks web page and to their community page. Every group has it's die-hard zealots, and thus down vote technology tag post that get pulled to the web page, or other standard tags that fit their community, but do not meet some zealots idea of the community standards.
I do not think this is about him "having his cake and eating it". IF people want to be rewarded in STEM token then they should use the tools of the community that created it.
Of course all that is just my opinion.