I downloaded a number of Stardock widgets including Fence and a number of other windows customising utilities (allowed me to alter all the system icons and themes etc.) I paid for a years worth of updates. I then reinstalled my machine sometime after the year was up, and lo and behold - because stardock utilised a downloader for all its software - this downloader was the only installer I had for it all. So I reinstalled the downloader - signed in - and it wouldn't let me download and install any of the software I had previously paid for as my year was up and I no longer had access to their software updates...
I must say I never contacted them about this - I wasn't overly bothered TBH - only lost about 40 quids worth of software. But it has made me wary of being forced to use a downloader for software which I have paid for. Maybe all I needed to do was find where the original downloader had plonked the installers on my drive before wiping my system - but it wasn't something I had thought of at the time and I thought I'd at least still be able to re-download all my previous purchases... If I pay for software - I want to manually download each installer so I can manage my own backing up of them - and not rely on a downloader which will lock me out after a set period of time.