I didn't mean the "chat with us now" engagements widgets; I meant, like, Google Hangouts, or Slack, or Twitch chat, or even an pre-Google-Docs Etherpad sidebar chat.

Though, honestly, I prefer the web-chat customer service for my bank/cellphone provider/etc. to calling them on the phone. I don't want to wait an hour on hold with my phone using up both battery and minutes; I want to just leave a window open on my computer and have it ding when they're ready.