If affordability is an issue, consider:
In the rare event you find a text list of keys on Facebook, they are almost certainly:
To be fair, ESET itself does use Facebook for promotions. However, they never post plain-text keys in the comments or via shady links. eset nod32 antivirus free license key facebook link
If you want a legitimate free license via Facebook, you must look for:
Note: These contests require you to enter your real email on ESET's official website. They never ask you to DM a random admin. If affordability is an issue, consider:
Facebook is a prime hunting ground for cybercriminals because it offers social trust. A link shared by "John Doe" looks less suspicious if it appears inside a group with 50,000 members.
Here is what is actually behind 99% of those Facebook links: In the rare event you find a text
Many universities provide ESET licenses to students for free. Check your university's "Software Portal" (e.g., OnTheHub or Azure for Education).
The Facebook link directs you to a page that looks exactly like the official ESET login portal.