Dear All, i would like to share income level for me with 4 domains PR4. in year 2010-2011, i earned $500 - $700 / month, mostly from link sale. From mid 2012 - until now, google banned my sites. it dropped my income, because my sites were no longer valid for link sale/post. Since then, i bought domains and sell again. it is harder to avoid google penalty recently. from 4 sites, i only got $100/month. For you who has similar experience with me, don't be upset. there must be other ways to increase online income. Thanks for reading.
Sad to hear that (especially because I bought posts several times at your site). I know many sites that sell blogposts and links successfully but they are made for people and the percentage of guest-post is small in comparison with regular posts.