Bitcoin.com never takes custody of the BCH, even while it is in escrow. This is why the escrow is called “blind escrow”, even though that term seems like an oxymoron.
It is technically impossible for Bitcoin.com to spend the BCH in escrow. In the majority of transactions, Bitcoin.com is uninvolved, as both parties can complete the escrow on their own. We only become involved when there is a payment dispute, and once involved we can only allow the BCH to be spent by the buyer or seller.
This is possible using OP_CHECKDATASIG, which is only available in Bitcoin Cash. This type of on-chain escrow is impossible to do with Bitcoin.