Your tool is very useful in finding domains but you're likely leaving a bunch of money on the table by only monetizing via domain affiliates. You should consid

Your tool is very useful in finding domains but you're likely leaving a bunch of money on the table by only monetizing via domain affiliates. You should consider a premium subscription where members pay 5-10 bucks to see even more domain options. Folks who buy lots of domains should have no problem paying for the utility you provide. I say this as someone who has found bunch of domains using your site but not once used your affiliate link to buy because you don't have my preferred domain registrar choice.