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Discord is on a quest to become a better messaging app
(www.theverge.com)
This is a most excellent place for technology news and articles.
Having a paid tier and being a "paid service" aren't the same thing.
It seems like you don't maybe know what you're talking about. If the service is available for free but there is a paid tier (like Twitch) then that's still a paid tier. Just because it's not providing the exact same features for the payment means nothing.