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1. General Requirements
AWS IoT Buttons you configure must not:
(e) operate as a gambling business (including without limitation online gambling (e.g., poker), lotteries (e.g., sale of lottery tickets), raffles, sports forecasting, and odds-making);
It appears they have specific guidelines when using their trademark
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16. Compliance with Law; Appropriate Activities. You may not use the AWS Marks in any manner that violates any United States or foreign, federal, state, provincial, municipal, local or other, law or regulation. Without limiting the foregoing, or any provision in the Agreement, you may not display any AWS Mark on your site if your site contains or displays adult content or promotes illegal activities, gambling, or the sale of tobacco or alcohol to persons under twenty-one (21) years of age.
In my opinion they might be contradicting themselves a little, as on this page .casino is one of the top level domains you can regiter.