Well you have mentioned some of the key factors so you are already on the way. I would add to this that the more UNIQUE your content the better your chances of attracting affiliates. Just because you update weekly and give 50% pay-outs doesn't mean you will get loads of affiliates if your content is standard boy/girl sex and you only have 20 scenes in your members area - there are other sites providing the same content with much bigger libraries which will blow you out the water.
However, if your content is unusual or unique in any way then you have a great chance of succeeding and gaining lots of affiliates. What is your site by the way? You should be shouting it from the rooftops every chance you get from now on . . a potential affiliate could be reading this thread
Make sure you add the website name and affiliate info into your GFY sig too
