Is it safe to use free VPN service
VPN connections give us an additional layer of security using encryption to all traffic coming out of our device until it reaches the server. Thus any downstream user can gain access to our data by MITM attacks and no company can register our activity on the network. Many users choose to use free servers, however, they can be much more expensive than we think.
Servers cost money
Servers are not free. A server costs money on hardware, electricity and maintenance. If a company offers a free VPN access it must be getting investment on the other hand and we run the risk that this money comes from the sale of private customer information.