Solarwinds gives or at least they used to give IT users a free sniffer tool to use to sniff their networks and find vulnerabilities.
They have paid software suites and the assumption has been the free sniffer was to acquaint users with the paid software.
But just like with Facebook is anything free?
If the software is free then you are the product.
But the free software sniffer may have been a Trojan horse
Logging vulnerabilities to be exploited at any time
All installed by trusting system admins