I don't see the big difference here. Many coins have a premine which goes to some "foundation/founder". Others have a dev fee, where some % of each blocks go to a collection (e.g. Decred). Is the only reason people keep spamming this crap because the zcash guys identified themselves as for-profit?
I've no problem with them keeping 20%. Beats the hell out of massive premine. It's only the first 4 years anyway.