There are crack groups who work together in order to crack software, games, etc.
If you search for Phonertica Crack, you will often see the word "crack" amongst the results which means it is the full version of the product.
Certified Site Metrics are metrics that are directly-measured from the website instead of estimated.
The website owner has installed an Alexa Certify Code on the pages of their site and chosen to show the metrics publicly.
Estimates are more reliable the closer a site is to being ranked #1.