It might be sketchy, but WooCommerce is a GPL project: https://github.com/woocommerce/woocommerce/blob/trunk/plugin...

This is explicitly the sort of thing that WP Engine would be allowed to do, and if Automattic isn't happy about this then perhaps they should have chosen non-free licenses.

Basically: "wire fraud" is an extremely overblown claim. Nothing criminal is happening here, because they're complying with the license. Is it ethical? Debatable.