well I am using both web 2.0 and Scrapebox, It could be a way, but what Iknow is that to have the keywords you want to rankin for in name when posting scrapebox, then have some good comments, that stick no url because it will be bigger risk of deleting, the web 2.0 the same, I dont know if anyone else have another experience but this is how i do, i just checked my stats for my webpage ive been working with and it has 10.000 backlinks and 2 months ago it had only 250, i think its an improvemnt but thought it would be more.... dont know if this helped and maybe alittle out of topic...