Nice thinking, Olympic bonuses in sports books. Well only good promotion in sports book I saw euro 2016 on sportsbet, for every bet on euro games you get ticket for lottery, and that was really great.
I see no one knows anything about any bonuses for Rio 2016 Olympics, I never was so much into betting on Olympics but that would attract my attention, and I would probably bet on site that offer some nice bonuses.
Well there is still a bit more time, maybe some site will offer something in last minutes. If not, then we will try to make our own profit.
There is definitely bonuses out there in the fiat sports bookmaker world, just not in the bitcoin sportsbook world!