Having some problems with this and figured I'd let you know. The referral page and the 888 page linked below show $600, but only $400 gets credited. Live chat support is also adamant it's only a $400 bonus and state they can only see $400 listed on the 888 link below - I've contacted support and will let you know how it goes. The $88 is also now $32, so I guess this referral link needs updating?
https://www.flopturnriver.com/poker/888-poker-23312
http://www.888poker.com/promotions/