I went down that route, When I started Affiliate, I was in the midst of building my {Current site}, but on the CJ profile, I had the first website I built, now in the trash bin because it failed, so used it as a learning curve.
When I applied for my affiliate, he saw my 1st {failed} website and denied me. I'm a type of guy that doesn't exactly take no for a answer, so I politely emailed them, with my half built {current} website which was built especially to work for his company. Straight after he checked the site out, he accepted me.
Obviously, I'm not going to share my niche, affiliate program or anything like that, as I have something that works well with my style, and don't want everyone jumping on board.