@Emsisoft Do you tie user's trial license with Hardware ID? If yes, then that seems quite the opposite of your reputation of being a privacy-friendly company. To be clear, I'm talking about this specific scenario only. I applaud your privacy initiatives except this one, if what I'm about to write is correct.
In my previous laptop I tried the trial version of Emsisoft in early 2019 I think. A few months later, I won a license of Emsi here on MT which I used for a few months continuously but eventually had to give up because of constant false positive while updating all kinds of apps including Firefox which at that time was a well known issue.
Later in mid 2020 when I wanted to check out Emsi again, it wouldn't let me. It said, my trial period is over. Tried a new account but same. Windows were reinstalled multiple times between my first use of Emsi to this one. Later I bought a PC and tried Emsisoft trial again, this time I gave up because of constant high CPU usage. I even reported on the Emsi forum, but the support stuff were struggling to reproduce it on their system.
Anyway, fast-forward to near the end of 2021, I wanted to try Emsisoft again because the official Emsisoft partner in my country was selling it for a lower than average price. I thought about grabbing a license but, like everyone should, I wanted to try the trial version first specially to check if the CPU usage has been fixed. But alas! Even with a new Emsisoft account, after activating the trial license it again said, my trial period is over.
Emsisoft keeping some sort of hardware ID of client's PC is the only logical explanation I could think of. When I reinstall Windows, it gets automatically activated immediately because of similar reason. Which makes sense for Microsoft to activate Windows, but not for Emsisoft to verify who used their trial version before. To make it clear once again, every time it was a different installation of Windows, so If my guess is correct then I kind of already know why (to prevent trial abuse) you do this, but even with that in mind, I find this to be a bad practice.
Correct me if I'm wrong. This is based on my experience only.