In my blog I talk about alternatives available to users. So, if you have a blog I can easily promote it by saying your blog is a great alternative to some product/site 
.
Easiest way to promote your site
Limitations - What the blogger will and will not write about.
I'll not promote site/products which are illegal with respect to google and bing . The site/product should follow there guidelines.
In short no porn, no illegal stuff !
