Contracting out your SEO work to Elance is an extremely risky business. Chose the wrong contractor and they could get up to all sorts of shenanigans that lead to Google penalties and bans.
Generally for search engine optimization wholesale I wouldn’t recommend Elance unless the contractor can provide fully verifiable references that you follow up in order to ensure they are:
- not ghost companies and websites created by the SEO company in order to provide references,
- not websites that the SEO company actually has nothing to do with.