There are gambling websites that offer great casino games, while others excel in their sports betting offerings. So which are the best online gambling sites? The answer will change depending on which games you like to play. The surveys were sent to professional gamblers and industry insiders in fall 2020 and early 2021. The rankings are based on expert opinions about the quality of each operator and specific ranking criteria. Detroit, Ap(GLOBE NEWSWIRE) - Detroit, MI - LeanBackPlayer announces the release of the 2021 rankings of the best online gambling sites.