Maybe you should consider adding odds for upcoming US presidential elections.
Bitsler https://www.bitsler.com/en/sports/specials/politics/outrights
Sportsbet https://sportsbet.io/sports/specials/politics/outrights
Nitrogen sports https://nitrogensports.eu/sportsbook
Stake https://stake.com/sports/politics-entertainment/outrights
buff.bet https://buff.bet/en/sport/outrights
betbtc https://www.betbtc.co/sports/politics
not sure if it's worth all the hassle to add a "one time thing every 4 years" event, especially with it being so close (23 days to go), but it's up to @bestodds.ai (:
Plenty of site if we check one by one, there's also https://www.cloudbet.com/en/sports/politics, but this site seems have a problem now, not sure if it will be added. BTW, I notice that there are still few sites bookies added in the site until now.
Seems that bestodds is busy. But in my opinion, even if this upcoming election is once every 4 years, still worth it to add.
As they can remove the politics after, if they want it to. Additional commission for the site though.
Looking forward to see more sportsbetting sites for comparison purposes.