Apparently this limits how many tweets users can read.
Verified account holders get amaximum of 6,000 posts daily, while unverified users must contend with a drastically reduced limit of 600 posts. Then for newly registered, unverified users, they face even tighter restrictions with an allowance of a mere 300 posts per day
yeah absolutely insane. I also saw that it might be due to twitter not being able to pay their server dues. For a while now Twitter has just not been paying their vendors and google may have finally shut down their stuff. He has been continually increasing it from 600, to 800, to 1k for regular users.