Sorry, no popup now and didn't capture when it happened. The popup originally sent me to a page that listed the products features. What made me suspicious is there was no link to purchase. I moved on to other things and the next day, the popup came back. Again, no link to anything so I checked the main site. No word or info about the product. I upgraded CCleaner to the latest build and haven't seen the popup again since. I came back to this again a week later because I just purchased more licenses of CCleaner and thought by now there must be more info about Kamo. It sounded like a very interesting product.
Google search does show one link: https://support.piriform.com/hc/en-us/articles/360044772192-About-Kamo but its a dead "oops" page.