i just started going through the list of web 2.0 sites to build a web 2.0 tier 1 backlinks, & when you get to the sites, a lot of them have either changed from free to paid memberships or they are offline or have changed to non web 2.0 such as soup.io, so is web 2.0 still a good backlinking method ? because the ones i built with unique content months ago still have none of the pages indexed, previously (years ago) some, i.e. blogspot used to get indexed almost immediately & blogspot & wordpress could get ranked on google.com for terms, now it seems almost impossible just to get the pages indexed, & thats with unique content & backlinking them with more unique content from other web 2.0's