Hi,
I'm not an expert but'll try to explain whatever I know. If I'm wrong please guys correct me:
Digital signatures is something about authenticity of online contents (documents and data etc.). Digital signatures are authenticated by the companies who issue 'Digital Certificates' to such signatures using websites. Digital Certificate issuing companies are again licensed by concerned Telecom companies and regulators (in specific areas, states or countries).
Now we see the governance tree like: Regulators > D.Certificate Issuing Companies > Signatures using websites> End users. Keeping in view the probable e-commerce volume in future, in can be predicted that a lot of 'Consulting' and 'Certificating' companies would be there in the market and shall need a nice name to attract global traffic & business. That's why such names would be fetching right price. (Again sorry for going wrong...)
Regards.