Abstract: A system for monitoring performance of sports betting activity of a bettor across a plurality of on-line sports betting operations (OSBOs), comprises a computer system, the computer system comprising digital data storage and one or more processors. The computer system is programmed and configured to communicate with a bettor device over a data link, for example, over the Internet. The computer system is further programmed and configured to receive, and store in the digital data storage, a first set of login credentials for a first OSBO and a second set of login credentials for a second OSBO, the first set of login credentials and second set of login credentials associated with the bettor.