Scammers are masters of SEO. They rank for keywords like "Navicat Premium 16 perpetual license key" to lure you in. Here are the red flags:
Here is the hard truth: Beginning with version 16, the default sales model shifted to subscriptions (12 months of activation). Even when version 16 was new, "perpetual" keys were phased out in most regions.
: Keys must be entered into the software within 14 days of installation.