This VPN is unreliable because...
They log your activity
They share your personal information with advertisers, such as (approximate city level location, and such)
They are using Google trackers on their website
googletagmanager.com
They are using a ton of trackers in their mobile app
Adjust,Bugsnag,Google Ads,Google Analytics,Google CrashLytics,Google DoubleClick,Google Firebase Analytics,Kochava,LeanPlum & MixPanel
They are using trackers in their browser extensions
According to information from Yegor's (the Windscribe CEO) Medium page he said
"Essentially, every single click that you make in the Hotspot Shield browser extension triggers a request to Google Analytics (https://www.google-analytics.com/collect) which logs every event like connecting, disconnecting, changing locations, etc.
Additionally, it also makes periodic requests to https://event.shelljacket.us/api/report/chrome_ext which is an alias domain for Quantcast, a company that does the following:"
Another thing they do is whitelisting the trackers they have in their extension from getting routed through their proxy, leaving your IP exposed.
HotspotShield's Privacy Policy