Needless to say, with those limits, Twitter is basically unusable. I really doubt these ridiculous limitations can be explained just by a sudden urge to scrape. Why limit verified accounts, for example?
Verified accounts are limited to 6k tweets/day. Assume the average human is awake for 16 hours a day. That's 6.25 tweets/minute if you did literally nothing but scroll through twitter all day long for 16 hours straight. Please explain how that makes the site "unusable" unless of course you are a non-human bot scraping site content.
Twitter with 600 tweets a day is clearly unusable. That’s one large thread, and you’ll scroll past most of it anyway.