VPN used for VR game cheat sells access to your home network - Ars Technica

This is extremely common with free VPNs. The way they make money is by selling your internet connection to anyone that has money and wants to use it. Having a large pool of residential IPs to use as proxies/VPNs is very valuable to criminals because traffic is less likely to be flagged as malicious compared to traffic coming from networks and data centers that are commonly used for malicious activity (like M247).