In reply to Emil Uzelac.

On the topic of a review seal, I imagine you've already read this post and the associated comments. https://wptavern.com/devpress-plans-to-launch-plugintheme-review-service If not, it's worth a read and may give you additional ideas on implementing such a seal. I had to dig deep to find the original article with great comments. https://web.archive.org/web/20111113125858/http://devpress.com/blog/launching-a-theme-and-plugin-review-service