Yep you definately have a login problem. But let’s get back to your idea…
It is a very good idea, I asume that you will be earning income of the 2nd tier and affiliate programs advertisement? If your idea is to create a database of content for your own portal site you will not have my support, but I am sure many others might not feel the same.
Further more the way you are setting up domains with a forward slash is no good. Rather setup your domains e.g. xhttp://slots.mycasinoportal.net that way from an SEO point of view it will be seen as a seperate domain. Currently your server is setup in Germany which is ideal for the european market, but what about the UK and other markets, can you possibly look at the asian and UK markets as well for servers in those countries?
The benefits to new affiliates will be that they can skip the ageing process for Google (at the moment anyway). But your domain is very new being registered a couple of days ago, so there is no benefit in that. I couldn’t check your other domains out and I am not planning on clearing my sessions or cookies right now, but an old domain will definately make me take a chance in using this concept. Would love to be able to login to investigate further though.