While we all enjoy free tools, we still need to pay our bills :), in our case here at DomainGenerator things are pretty straight-forward, when you buy a domain name through our links or buy from our recommended products and services, we get a % fee from that.
We don’t encourage certain tld/domains just because we’ll earn more, our recommendation engine is completely out of that, we recommend whatever domains we find relevant for your query and if you choose to buy any, we get a fee.