I pledged because success is a result of a system and the system should be compensated too! Also, money has diminishing returns on happiness (after about $45,000/year), so I don't expect to benefit from the extra money.
I was a co-founder and CTO of Edify Technologies, which went through Techstars Boulder in 2015. I now work in blockchain for good to coordinate the building of a new operating system for humanity that optimizes for good/resiliency, not profit/speed.