Are you saying that, Dynadot is refusing to take down an old sales page for a domain you recently bought through a broker, and that old page still lists the domain at a cheaper, outdated price set by the previous owner?
Looks like it's an escrow with crypto (specifically, stablecoins only) as the payment option. Their fees are slightly lower than escrow dot com, at least for any transaction over $500. Looks like there is no concierge service, no domain holding...