I've, on occasion, checked out some directory list of casino sites, but, I don't like the casino sites they link to/advertise.
It's mostly those unknown/very new sites, or fiat casinos that added btc as a new form of deposit.
It's hard to deal with those primarily fiat casinos, as they always ask for verification even with BTC withdrawals.
And, it's also with those directory listings that I've seen several casinos with different names, yet with virtually the same designs/functions on their site. Same template? But, makes me think it's all run by the same operator. Shady shit.
So, additional bonus is great but, do take care on the casino sites you'd list.