You already have accounts in several bookmakers
If you already have an account on a bookmaker, you will not be able to complete their welcome offer.
I already have account in all the bookmakers, completed all the welcome offers and I'm still able to make a profit every month.
Bookmakers also offer recurring offers every day to their existing customers.
Some examples are:
If you make a deposit into your account
On the Diary you'll the earnings that are related only to recurring offers. (not a dollar has been made with welcome offers).