Well maybe I'm wrong then; its just I feel like people should know that buying a cheap service and calling it a day (they're all cheap here, you're not paying VAs to create authority web 2.0s, populate your accounts/profiles with real info and pics, etc. and then hand write keyword researched articles for each post or doing this yourself creating each property for just your one site to promote, mixing in more quality articles without links and even some linking to other niche related sites to avoid a footprint - this is real quality and very expensive and time consuming) isn't going to be the end of your SEO efforts. Some of these services are high quality or at least close to it that you can add to your stuff like I mentioned, many of it is lower quality that you can use to boost your quality tier 1 links. I just don't understand why people expect to get a unique web 2.0 account created and populated with multiple articles, etc. and pay $2-$5 for this (the cost of just 1 of the articles not to mention the filler articles or the account work); obviously you're sacrificing pay for quality which is find its just as a buyer you have to understand how to use these links (part of a larger campaign or great quality tier 2s to boost your really good tier 1s).
(I don't sell services here BTW, I'm not defending anyone or anything I just think there are a lot of services here that do what is advertised at a good price but people use them wrong or think they're more than what they are so they're disappointed. You're not going to get a $25 well done 3-4 article web 2.0 not shared with anyone else for $5 or less, especially when the provider has to make a profit after paying their VA instead of you just paying the VA and I think assuming you are is just ridiculous. There is still use for this which is why they're still good services - you're just using them wrong.