A lot of this is merely price discrimination. Some people won't find out about cheaper certificates and will pay lots more money for something from GeoTrust. GeoTrust actually owns RapidSSL (http://www.rapidssl.com/ssl-certificate-about/index.htm). NameCheap is reselling those RapidSSL branded certificates for less than RapidSSL.com is selling them. RapidSSL.com is, in turn, selling certificates for less than GeoTrust. And they're all signed by the Equifax root certificate!
Single root certificates are a better option and the RapidSSL certificate that NameCheap is selling for $10 is single root and run and signed by the same people as GeoTrust. Do go with a single root as it makes life easier.
Single root certificates are a better option and the RapidSSL certificate that NameCheap is selling for $10 is single root and run and signed by the same people as GeoTrust. Do go with a single root as it makes life easier.