If I've understood the intent correctly, the individual investor side of LTSE is only a small part of the picture. The biggest part is that the company itself is setup for long-term focus via its principles[0] -- as one example, compensating executives not based solely on hitting a single quarter's numbers, but on performance over the long term.

So long as a company adheres to those principles, it doesn't matter if an individual investor can obtain their shares via ShortTermScumbags.com or the like. Having investors who are along for the long haul is a nice-to-have, not a must-have, since the goal is long-term focused companies which will naturally, via its principles, eschew reacting to short-term trends in share price.

[0] https://longtermstockexchange.com/listings/principles/