I would say to be careful writing this kind of thing. Make sure you’re abiding by the new FTC guidelines on disclosure if you or the client is US-based. There’s nothing “wrong” with it though, and whether or not it can be optimized for multiple niches will depend entirely on your and the client’s SEO abilities. If they’re an SEO pro it would probably be much easier for them than if they were new to it.

Look at any content network — technically they’re hosting content in dozens, if not hundreds, of niches under one primary domain. Optimization is a per-page thing. However, it would be more difficult to optimize the main areas of the site for anything particular, meaning branding elements would have to overpower SEO if they want to take advantage of any significant level of type-in traffic / visitor loyalty, and that would be very hard to do on a site riddled with CPA offers in every post. It’s all about what the client wants. Are they only worried about SE traffic to internal pages? Then having them on the same site won’t be a huge problem. Do they care about the visitor loyalty, natural referrals, etc.? If so, I’ve found niche-specialized sites do much better (why those same content networks generally break down into subdomains or folders for internal separate sites).

For affiliate programs it’s just a typical waiting game if I want a program I’m not already a member of for another site — that’s why I had to wait about a month before getting approved for the one real niche affiliate program appropriate for the site.

If you’re allowed to put in ads and banners, then you would either do it through a sidebar widget or you would upload the image somewhere (not sure if you can directly through WordPress when you’re not hosting it yourself) and then you’d add the link and image code to the template files (which will vary depending on where you want it – in posts, header, sidebar, etc.). There’s no one-size-fits-all answer.

As I expand the series, I’ll be promoting the posts more actively via Twitter, and with the next post I’ll probably also put the recent blog posts up at the forum so it’ll display my latest post there (it displays the posts from this blog now I believe).

And then I do announce some things on a social network I use very privately. I don’t use it to connect to people outside of friends and family so it’s not a huge reach there, but they sometimes do a good job of spreading the word elsewhere when I have launches. And if nothing else I know some of them will check it out.

This is a very typical “light launch” for me — the kinds of things I do with most of my site launches (only exceptions being when I plan bigger, harder launch campaigns, but it’s rare that I put that much effort into them up front). And most of my soft launches hit 3-figure incomes within a few months even w/o anything aggressive, so I’m hoping this one will prove to be an example.