Unauthorized?! It's 100% legal! Maybe not 100% moral, but I needed this for a nonprofit. I donated GiveWP to this and 2 more nonprofits - it costs me $420 per year and it's worth it. But no plugin developer offers a nonprofit discount, and the pricing is just cost-prohibitive. So, I donated the lifetime plan for GPL Vault. Keep in mind, that I could've decided not to pay for GiveWP as it's available from GPL Vault, but because I know it's a complex piece of work... although extremely buggy, I wanted the developers to continue the development and fix those bugs at some point far in the future, but the other stuff is just nice-to-haves and not worth the asking price.
