The author is using deductive arguments in the article by saying that gambling is winning or losing due to chance and the hope to win something bigger. The author makes a point that fantasy sports are legally possible because the games are classified as a game of skill and are not subject to guidelines that other forms of gambling has.
One of the fallacious arguments made by the author is he used defined gambling and used it to his advantage. The author defined gambling as "placing something of value to be won or lost on an event of uncertain outcome in the hopes of winning something greater." The author is using the definitional fallacy. The strength of this fallacious argument is he is using