After 90 days, it will stop saving and won't support plugins unless you buy a license key.
A one-time purchase of a perpetual license, priced at approximately Rhino 7 Licence Key
McNeel actively pursues license violations. While they are generally friendly to students and hobbyists on a trial, commercial use of a cracked licence key can result in lawsuits and fines. Your ISP or IT department can also flag the network traffic from a patch tool. After 90 days, it will stop saving and
: The most direct way to buy a new license or upgrade from a previous version. After 90 days