Twitter adding daily limits to DMs for users without Blue
We'll soon be implementing some changes in our effort to reduce spam in Direct Messages. Unverified accounts will have daily limits on the number of DMs they can send. Subscribe today to send more messages
Also many companies provide tech support via Twitter (e.g. PayPal).
I also wanted to add that ZSSK (Slovakian state-owned passenger train company) uses Twitter for reporting extraordinary events like trains being very late, cancelled, alternative bus transport (which can be pretty important as buses can't always get to each station), etc., but checking zssk.sk I noticed they switched from Twitter to Mastodon after these recent events.
A tip isn't a story in itself, it's a suggestion of where to start looking for one. "Hey, I'm off the record here, but some shady shit is going down at my job and you might want to fire off a Freedom of Information request for x, y and z or talk to a and b" is a pretty good tip.
Guess you're right, I just find it weird for anyone to leave a worthwhile tip over an unencrypted third party company's messaging. It's like "I'm off the record... but I don't really care who hears me say it".