Github vs Gitlab is one commercial party against another, if the products are roughly comparable and you want to take a very strong stand in favor of either party you should declare your affiliation (or none). ACs that from the very beginning seem to have an agenda are always under that cloud, and it's easy enough to dispel any doubt.
Contrary to that there is no gain for me to be a privacy advocate.
Contrary to that there is no gain for me to be a privacy advocate.