Used to watch Jai Alai at the old MGM Casino in Reno back when I was book learnin at UNR a thousand years ago. Couldn't remember a name if a gun was at my head (probably couldn't pronounce it anyway - most were Basque or south American). Was a blast to watch even though after the 4th or 5th bourbon & water trying to follow that little round missile was next to impossible.
Never heard that it was illegal - just not well attended. MGM carried for 8 - 10 years as I recall. There were a few times when other than the 2 or three of us there the place was empty but for the cocktail waitresses. Can't imagine why it'd be illegal except for the gambling aspect to it - not a problem in NV.
When it comes to scent, there are basically two types; those that attract and those that mask. I've tried both on many occasions. There are lots and lots of "doe in heat" scents, designed to attract a big buck into range. I've also used a "cow in heat" scent while elk hunting.
Another scent would almost be better named as a "coverup smell". The main goal is to cover up human odor or mask it. Though I don't believe you can ever totally eliminate all human...