how long would it take to follow every twitter user?

[AcrylicBuddha]

Out of curiosity, does anyone know? Or have an estimate? Or know of a program that automatically follows people?

[Austin]

I imagine it would be nearly impossible, considering that new accounts are always being created.

[deafeningjudge985]

Twitter explains it quite well in their support page (see link below this answer!)


Why you can't follow anyone:

You've probably hit a follow limit. Twitter has imposed reasonable limits to help prevent system strain and limit abuse. If you hit a technical limit, you'll see an error message when you try to follow. Remember that you cannot follow a user who is blocking you. We do not limit the number of people who can follow you.
Twitter's technical follow limits:

Every account can follow 2,000 users total. Once you’ve followed 2,000 users, there are limits to the number of additional users you can follow. This number is different for each account and is based on your ratio of followers to following; this ratio is not published. Follow limits cannot be lifted by Twitter and everyone is subject to limits, even high profile and API accounts.
Every Twitter account is technically unable to follow more than 1,000 users per day, in addition to the account-based limits above. Please note that this is just a technical limit to prevent egregious abuse from spam accounts.
Accounts are also prohibited from aggressively following other users. Our Follow Limits and Best Practices Page has more information on Twitter’s following rules.