Thanks it really was - although I regret not spending as much time on it as I could have.

I basically ended up doing no marketing for DomainPolish whatsoever besides a few posts on my blog which were popular on HN. A few other people tried out the service and wrote popular blog posts as well. I think doing the thank you videos in the beginning was key because it gave people a huge incentive to tell their friends about the site.

I wish I had more to say on marketing but that's something that I'm working on a lot now for my new startup. Hopefully in 6 months I'll have some more lessons to share :)