I actually find it quite strange that people are having low conversions with Playtech casinos. They have always been our top performers on pretty much every site.
Casinoblasters, EuroPartners and Cpays have some very high converting brands. I also think that Blackpoolclub has the potential to do very well in the UK market.
Although, Microgaming casinos are great if you are targeting ‘no deposit’ and ‘free casino bonus’ keywords. You will find that there bonus schemes mean you get a lot of downloads and then they are very good at tempting new players to deposit.