I think you maybe missed the idea in my original comment -- opening up the platform to business and marketing in any of its guises whatsoever causes the dilution.. as is so often repeated, tech can't solve social problems, and I really have no interest in allowing marketing to invade my social space.
Any rules can/will be gamed, reinterpreted and twisted such that the end result is the always same -- I'm notified by a human-contact medium of a supposed human-contact that was actually a sales or marketing ping. I don't want that, nobody does.
Re: leaving WhatsApp, I just decided I didn't need it. People can voice call if it's urgent, for everything else I'll see it eventually. There was no gap in my life needing filled by an instant-response chat app with instant-online-status and instant-typing-notifications, I just came to find it all generally annoying