It's literally just another centrally coordinated shadow chain, "pre-confirmed transactions" and "vTXOs" are scammer nomenclature, not protocol design.

There is a unilateral exit happy path with pstx's, if you can afford it, but Ark only exist to serve poors that can't afford lightning (therefore can't afford a UTXO or the exit)

It's a trustodial system and their marketing is just the first violation of trust. Bad actors, avoid.