Current plan that hasn't been decided yet is to give devs 0% of unclaimed stakes. Instead, those stakes would be used to create a licensed investment fund that will pay dividends to everyone in the nemesis block. The fund would be a venture capital fund that gives money to companies using NEM, the same as any other venture capital fund would work.
And what about the SEC? They don't like money going to anonymous people.
If we do it correctly all the way and if there are any issues, then we will solve them as we cross the bridge. To start with, there is nothing cast in stone yet. It is not on the block chain per se, i.e., immutable and irreversible. Further, we need to seek legal advise on this matter.
Do note that there is a difference between anonymity and privacy. Most people care much more about privacy than anonymity. People staying anonymous have their reasons.
If the terms of reference and rule set are laid out, people always have the option to participate or not.