I just built about 50 micro sites. The trouble is now, what is the most cost effective way to build backlinks to them? If I do the backlinks myself like say...scrapebox or senuke, then it will be cheaper but I could of spent the time to build more sites and 1 at a time might be too slow to promote all 50ish sites. If I just buy services, then the bill can rack up pretty high quickly. Plus is going to be tough to keep track of who is doing what. And how do I know to just give up on a site or keep building links to it. I'm guessing is a dollar amount that I will set arbitrarily. What do you suggest I should do?