Another big issue, is that any winnings you have in your cash balance are void until you've met the wager requirements, so you cannot cashout winnings even if you win in cash balance and not bonus. This is likely due to L&L offering a big affiliation comission per deposited sign-up, so Thepogg make the site look like a reputable. Thepogg (An overrated review site for casinos) rated this a 9.6/10, and this isn't due to them being a good site. I understand this is a tough game to bonus, but the games reels were very unnatural, and same goes for my time on Book of Ra. I noticed this unusual activity when I did hundreds of spins on bonanza, where I was getting the 'G' and 'O' symbol very frequently, and had no teases for the bonus. A lot of the games they have on Yako are fake games, so they're exact clones of the original game, but manipulated in their favour.
Please look elsewhere and find another casino which is more established (E.g Whitehat, Nektan). I want to stress this to anyone planning on depositing. This is one of those atrocious casinos that are operated by L&L, which also runs Fun casino.