Just because the people you showed it to couldn't imagine using it doesn't mean that there aren't a lot of people out there who desperately want it and would recognize its utility to them.

To other creators: 0.1% of the USA and EU is 777,000 people. OP made a very niche product, hopefully he showed people who need SEO-related products, but if you only need to sell to 10,000 people to make a profit, you might "just" have to find them.

Of course, part of the "product" is telling the right people they need your product. If you can't do that then you haven't really finished the product.