According to the website the daily limit is in the range of 10k for verified users, 1000 for unverified and 500 for new unverified
How many twittes do you read a day? and have you ever read more than 500 twittes a day?
Back in the days of being entertained/horrified by the post of a certain 'leader', I could easily read more than that in a single scroll (in fact, giving up on scrolling, but knowing that the page had loaded(/
was cued up to load) many more. Never mind checking on any mildly-nested tweet that looked interesting and had replies (or looked like it might have interesting replies).
Now, I've no idea how it looks to an actual account-holder (and, e.g. via the App), but it seems to me that it doesn't take much effort to scroll through 10k tweets (perhaps skimming and scanning for the pearls amongst swine; or even the more pearly swine). And quarter of an hour concentrated 'one a second' skimming isn't totally unexpected for an experienced (not-new) unverified user, surely. (Or half an hour of wallowing around and two seconds each puts you at 90% of the quota.)
As a no-account reader, though, I'm glad that I mostly don't rely on tweets. Maybe it'd pursuade me to register (and suffer the 500 limit) if I was keeping an eye on Highways Agency notifications (from which I'd need to mind-filter out all those that don't pertain to any roads I'm not using) or had a reason to follow the progress of a sponsored charity event or had an extensive schedule of space-mission reportages to keep up-to-date with. Or just was rather used to perusing various "Joke/Word/Recipe/Puzzle/Fact Of The Day" sources.
Luckily, I tend to know self-published resources for any of those things. Not as handy, perhaps, as a centralised Tweet-access point, and I also find anywhere that has "follow us on Facebook for more details" to be just as awkward because of the 'facebook enveloping' (javascript cruft/etc) and especially when it's not visible at all for unregistered (thus 'non-friended') access. But you just know that others will be excessively hurt (at least in their psyche) either by being unable to continue with their prior habits
or by losing any effective-followership due to hard decisions by those followers as far as self-rationing is concerned. (Or not sufficiently restraining themselves then hitting the hard-limit.)
It almost looks like a broken attempt to promote the "blue-tick-4-money" service, except that I think we've already established that it's a broken attempt to get around more technical (B2B) issues. Either way, I imagine some will now 'upgrade' (almost three hours now possible of rapid tweet-skimming, for the truly devoted/addicted), but I think it'll put off some who were maybe thinking of doing so, seeing how a bit of server-side wankery can render even 'premium' users disadvantaged quite a bit...