I purchased my license key about 6 months ago, and I just recently (two weeks ago or so) had the inkling to check my account online. To my surprise, there have been 30+ other people that have used it. I do not know these devices, so I had to manually remove them.
How does one remedy this potential leak?
For my part, I think my accounts have been secure.
Emails all have MFAs.
Password quality on everything is usually 180+ bits.
The device I'm using the key on is routinely cleaned, and I am always careful re: phishing, malware, etc.
I have never shared my key to anybody. It didn't stop several people to use it though. As of now, there have been two or three other devices constantly using the license key which I remove almost every other day over myESET.