Wild West Domains started operating as an ICANN accredited registrar in July 2002. The sole purpose of WWD is to service domain/hosting resellers. The reseller program was formerly part of GoDaddy.com. This became a conflict of interest for the reseller program. So, WWD was spun off as a separate registrar for the reseller program, and it took off.
So the info at Whois.sc is accurate. GoDaddy is still the #3 most-used registrar.