Capital One ranks number one on Google for [auto loans].
Their most linked-from domain? eBay.com
Here’s how it works:
Car owners who sell their car on eBay that use a template from AutoRevo have a section about financing (and a link to capitalone.com/autoloans) in their listing.

Capital One Auto Loans link on AutoRevo's eBay template
Dealerships that use a dealer website template from AutoRevo have the same thing.

Capital One Auto Loans link on AutoRevo's dealership website template
The result is Capital One maintains the top spot for a highly competitive keyword based on the growth of a car dealership web design company. Quite clever.
Interested in SEO research on Capital One or another firm? Contact me through Digital Due Diligence.