Earlier quoted context omitted.
No, it wasn't a "service" - it was a program. Unlike this thing. The main difference between this and Pidgin seems to be that you pay a monthly fee for someone to man-in-the-middle all your communications.
It is a service, because the bridge is a software that need to be keep operational 24/24h and sometimes this is not so trivial (if I don't get wrong WA need an Android emulator running).
When you take away the motivation to mitm all of the users' chats, there's nothing left.