Usually this will only happen if you have violated Twitter's terms of use which you agree to when you sign up.
No, Twitter does not keep the number of accounts that they have suspended on a specific IP address.
No, Robert Downey Jr. does NOT have a Twitter account. There are many fake/imposter accounts which have since become inactive/suspended, but no official account.
Follow the related link below to the Twitter Help Center which gives various reasons as to why Twitter accounts are suspended. You can contact Support from there to find out why you were suspended.
No it doesn't.
No, only their parents have Twitter accounts.
If your account is suspended on Twitter you cannot see your followers or those you are following.
Automatically updated Twitter accounts (such as clock accounts) use API.
Twitter typically verifies famous celebrities, organizations, and companies. They don't just give out verified accounts. You would need to become famous to get your account verified.
Yes they do have separate twitter accounts. The way you tell is by the blue check mark. (:
Today all footballers have twitter accounts.
No, you don't need. Twitter is completely for Free.
Yes, twitter accounts are free