For book/ebook authors, publishers, & self-publishers
Never pay to be a guest blogger on any other blog. Guest means guest. Guests don't pay to eat if invited as a guest. It's just wrong.
If a blogger wants you to pay to guest blog post on their blog, they better be ranked in the top 200 of Alexa. At least.
If any member of this network ask you to pay to guest post on their blog, refuse them. It's not right. This network is designed for people to trade blog posts or simply to offer guest openings to others.
The same is true for book reviews. Never pay for them.
Also, note - Don't pay $200 or more for a 10 to 15 virtual blog tour. They are worthless. Do a real blog tour - a SuperStar blog tour, a Mega Blog Tour, or a Blogpalooza that really create impact.
See details at http://www.bookmarket.com/blog-tour-palooza.htm
-- John Kremer, author, 1001 Ways to Market Your Books