While you might see search results for "free license keys," these are often illegitimate or refer to historical temporary offers. Here is the official breakdown of how REAPER handles licensing:
If you are an individual using REAPER for personal use, or if you are a business making less than $20,000 USD per year, the license is only $60 . reaper license key free
Using pirated software for commercial projects can lead to legal issues. While you might see search results for "free