If you ever have a truly bad experience with a business, you'll have options to provide more feedback when blocking chats with that company.
You might see more companies using WhatsApp in the first place. The Facebook-owned brand says it has cut the time to get started with business chats from "weeks" to as little as five minutes. WhatsApp believes this will mainly help "medium and larger" firms, but that's still helpful if you'd rather not make a phone call or wait for email.
You'll have to wait a while for companies to adopt the new API. Still, this could be a welcome update in the many parts of the world where WhatsApp is ubiquitous. You might have more reason to fire up WhatsApp the next time you want to shop or manage an account.