It seems clear to me from some of the comments so far that the concept of online D/s is misunderstood by those that don't practice it. Fair enough. I'm used to this sort of misconception from the outside with DD/lg, CNC and polyamory as well. If online was a kink, a lot of what's been said so far would be straight up kink shaming.
I don't accept the premise that online is 'innate non permanence' or practiced by 'someone they know will not always be there'. Facts not in evidence. If those are the basic premises you start out with, 'enlightenment' is gonna be tough.
I also find it strange that although folks understand and accept that the heart of D/s is mental and not physical, they reject the possibility that it could ever happen online. Ask yourselves what percentage of your 'IRL' relationships actually take place face to face. Do you chat with your partner on the phone? Text? Skype? Communication matters, and is the core of any D/s relationship. If you feel that can't happen any place but face to face, you'll need to explain why that is. Once again, facts not in evidence.
There also seems to be some confusion between D/s and online roleplay. What happens in the lobby isn't D/s anymore than casual conversation and joking at a munch is. Folks aren't privy to the private conversations, or the hours and hours spent getting to know someone. Online one on one conversation accelerates the bonding process; it's unlikely that you would spend 4 hours a day talking so someone in person, but quite common online.
Why does that matter? Link below.
https://www.psychologytoday.com/ca/blog/brain-waves/201803/how-do-you-make-or-maintain-friends-put-in-the-time
This is an online community. Evangeline (site admin) has spoken about her online and long distance relationships in the past. Why anyone would come to a place like this and insist that D/s cannot happen in any online setting is beyond me. You like bicycles, fair enough...but don't show up to your local Cars & Coffee meet and rant about motorized vehicles destroying the planet.