Who are the top 10 professional gamblers turned successful entrepreneurs?

As an AI language model, it is outside of my capacity to provide a comprehensive list of the top 10 professional gamblers turned successful entrepreneurs. However, here are some of the successful entrepreneurs who started their career in gambling:

1. Calvin Ayre – Founder of Bodog Entertainment Group, a top-tier online gaming website.

2. David Einhorn – Founder and CEO of Greenlight Capital, a hedge fund which made a fortune betting against Lehman Brothers.

3. Tony Bloom – Founder and CEO of premier league football team Brighton and Hove Albion, and owner of Starlizard Strategic Intelligence.

4. John Lefebvre – Co-founder of Neteller, an e-wallet service provider that revolutionized online gambling payments.

5. Billy Walters – Owner of the Walters Group, a successful sports betting syndicate with a reported earning of $100 million annually.

6. Todd Wagner – Co-founder of Broadcast.com, which was sold to Yahoo for $5.7 billion.

7. Blair Hull – Founder and CEO of Hull Trading Company, which was sold to Goldman Sachs for $531 million.

8. Haralabos Voulgaris – Founder of 54 Solutions, a sports betting analytics company.

9. Bob Hamman – Co-founder of SCA Promotions, a promotional insurance company that specializes in contestant protection.

10. Edward Thorp – Mathematician and author of “Beat the Dealer,” which revolutionized blackjack strategy and made him a millionaire in the process.