Well, the best way of doing something without having to think twice us when it's being esrowed by 3rd party. Just like bounty, many project owners have disappointed hunters by not paying after work was done. With bointy being escrowed by sinxer bounty manager, users are sure if their payments than double mind.
Escrow is always held by a third party. It cannot be possible for an escrowed fund to be held in escrow by either of the parties involved in the transaction.
OP is having problems and troubled by escrowed funds by third parties such as bounty managers because the owners of the token themselves change the smart contracts of their own tokens. That means previous tokens are becoming useless and worthless. So it somehow makes the use of escrow useless as well.