How does Google calculate domain age?
URLs are important for search engines like Google. Do they care which endings your URLs use though? Do they look at the whois data or do they rely on the crawler?
How can the website rank better using only White Hat SEO?
Can they compete with Black Hat Websites? Can a website compete for high rankings using only white hat techniques? First of all, you always want to be making a white hat website, something that stand the test of time.