I've been at it for about 3 months, just getting over the learning curve. I've made about $4500 so far, mostly dating sites, a bit of porn and other various products.
For the most part, the first few months consisted of teaching myself the industry, blogging, a bunch of SEO, and how the porn industry works in general.
Motivation is the hardest part for me. I have all the time and tools necessary to build 10x the sites and traffic that I have now, I just can't find the will to do it and end up just jerking off and watching some tv. Weed helps with the tedious shit though.
I'm considering working for a program as opposed to promoting one myself... A set amount of guaranteed income and deadlines motivate me.
