I'll agree with VerdeLuck 100%

Crystal took off because they split off already populated servers from Aether and Primal to birth Crystal rather than starting from scratch IMO.

Between DC travel and not having already established communities Dynamis is basically doomed unless there's some extreme measures taken (DC Travel cut, even more incentivizes to re-roll on Dynamis including having progression groups done there although I dunno how they'd ensure such groups were legit).