This is an interesting suggestion with huge (has this word become to fouled to use?) implications. I’m very surprised there isn’t more discussion. . . but then, I think, we all assume there is but we just haven’t stumbled onto it yet. In any case one clear cause of failure to try democratic decisions systems is ownership. Our social media networks are owned as you show in the hierarchical structure of those networks. Capitalist organizations have only one goal but democratic rule allows, in fact demands, a diversity of goals to debate. Placing profit as the sole, dominant goal makes the process ultimately irrelevant.
Ok, so this is presented as a first step in an attempt to change the autocratic system? No problem with selecting background colors or moderators but where is the forbidden line? We know that democracy in its dominant form survives only in the sandbox allocated by the owners so as an experimental work area this may be allowed. No owner group will risk this type of thing corrupting the core functions. So what’s the real goal here?