Hola is probably the most popular VPN service today, allowing unblocked access to region-locked content. It has been discovered, however, that they have been selling access to their network to third parties. Hola was just used as a botnet for attacking 8chan.
Adios, Hola lays down the reasons for why the extension is problematic, and helps you determine whether you are at risk.
Hola’s response? That was the agreement all along.