[matt1]

There's a huge drop off in affiliate revenue from GoDaddy to the next most popular registrar. Making Namecheap default would inconvenience most the users and cause a substantial drop in my revenue.

I appreciate where you're coming from, but I'm not sure the pros of switching outweigh the cons.

[rhizome]

So, it's not really that most people use GD, but that they offer the highest affiliate rates.

[deanpcmad]

Maybe offer people a choice between GoDaddy and/or Namecheap. If you offered Namecheap I would buy domains through your site all the time :)