No, I wouldn't. Most of what I do requires Free Software licenses or sometimes even GPL compatibility, and such licenses are neither free, open nor GPL compatible. For me, such software wouldn't be much different from proprietary freeware.
In many cases it's not even relevant what I would do or not, because such licenses make it not possible to integrate such code in a project under GPL, or to include it in a free distribution.
Looking at these licenses closer, I wonder if Parity could actually be considered free. Seems to my eye like it could be, but IANAL. For practical purposes, I'd probably consider it same as non-free until it's said to be DFSG-compliant. Prosperity sure isn't free though.