Welcome JewelPalace … :wavey:
It’s true … if a player already has an account with Windows Casino they would not be able to register through your link, since they are allowed to have only one account. This is true of any casino you may be affiliating with, since a person can only have one account at each casino.
I think the reason you think your casino looks boring is because there is the glitzy header and then nothing but text below. I would ask the people at ecasinocash if they can make 3 columns under the header. Put in a few more graphics of games and whatever on both sides and put the text in the center column. If you got one of the less expensive options I don’t know how much customization they are willing to do. If the site is hosted on their servers, perhaps they will give you FTP access and you could fix the page yourself.
As to SEO … you may want to click on Webmasters Forum in the top navigation bar … go down to the section Search Engines and Domains and enter at Search Engine Optimization … scroll to the bottom and select posts from the Last Year … there should be something in those discussions that may help you.
There are some very good ebooks on SEO as well … gets quite involved … not really something anyone can tell you in a post or two.
Good Luck to you.