Very cool. Was cost a consideration when evaluating your options? I don't know how much CF workers cost vs. any of the GCP offerings, but that would be a cool thing to see if you have the data on hand
Cost was definitely a consideration (although not the only one) in deciding whether to store all created links vs. just a blocklist.
Once we got to a mode where we were only doing computation per request, the raw cost is pretty minimal since there's not much CPU time either way.