Not the parent but I specifically transferred away from namecheap because you attempted to increase my renewal on a .club domain by 15x, claiming my previously-registered domain was now a premium domain. Google Domains charged me the regular price.
Highly doubt this was intentional. We get pricing from the registry. What likely happened here is that the registry reclassified this as a premium and our support wrongly quoted the new tier to you even though it wasn't relevant since it was a renewal. Sorry you had this experience. It was likely an honest mistake.
The price was increased in my auto-renewal notice - I spoke with support after receiving the email.