That’s exactly what it’s for. If you use it commercially without paying winrar will come for you, but as a personal use case it’s just ad ware. You get the product, and deal with their ad every boot. You could pay for it, but it probably the least annoying ad on the internet right now.
I remember hearing that they have gone for companies before, but that was a while ago and, ya know, just something I read that may or may not be particularly accurate.