1. What did you base your assessment of 40% address activity on? Monthly BTC exchanged? Days destroyed? etc. Specifically, if the amount of "cryddits" claimed through the process is significantly less than what you anticipate, what will you do then? (based on the popularity of bitcoin compared with, well, any alt, I suspect this is the case).
I recall seeing an estimate that up to 50% of the wallets of the earliest miners were lost at some point, due to just not thinking that bitcoin would ever have any value and overwriting it with a cool new game instead -- or having a hard drive failure, or losing the notebook that the key was scribbled in, or an OS reinstall after forgetting to back up the bitcoin wallet, etc....
I guess that more recent miners, aware that bitcoin has actual value now, have been much more careful with their wallets, and that at this point a smaller total fraction of them (like 40%) are lost.
If my share winds up smaller than I presently imagine, I will shrug and laugh. My retirement is already paid for, this is something I'm doing mostly because I think it's good for the world. If my share winds up much larger than I presently imagine, and the cryptocurrency turns out to have actual value, then I will probably use the excess to do something else I think is good for the world, like funding long-term (more than a century) research into the maintenance of closed biospheres, human bioengineering for longevity, contributing to an endowment for an eventual off-earth colony, etc. Or possibly spend it on stuff I in particular find to be fun and rewarding, like robotics, 3d printing, automated construction, solar power engineering, or AI research.
2. Assuming that the distribution goes on, I expect 28 months to elapse before you get the coins necessary for your "pre-mine". How do you plan to fund the project in the interim? Bounties, marketing (if any), etc
Fund? Ha. I'd be putting up a public server with a stable IP address, working on development as often as I can, completely ignoring the concept of marketing, and expecting no help except from volunteers. And if no one volunteers, I'd be okay with that too. I'm in no hurry. The entire point is to try to create a *usable* digital currency, not to invest in it or get rich off of it.
3. Several coins that heavily weigh a PoS scheme vs PoW have susceptibility to spending attacks where a single holder mines the majority of PoS blocks (see yacoin for instance) without a PoW block appearing. What measures in PoS block generation do you propose to mitigate that?
Widest possible initial distribution. Providing a reason (hey, free coins on this blockchain!) for people who otherwise wouldn't adopt to come in. Roughly equal initial distribution resulting, at least I hope, in roughly equal proof-of-stake awards.
4. You mention using transactions to determine if an address is valid. What is a transaction? Sending bitcoins to a non-exchange affilitated address?
Yeah, that's a sticking point... As I said earlier, I'd like to put it into the hands of actual users of cryptocurrencies who use it for buying and selling things rather than currency market speculators, and I could do that by just filtering out addresses that have never been used except in exchange transactions.
But after a look at the blockchain data, as far as I can tell actual users constitute less than 5% of the population of current holders of cryptocoins, which is depressing... and I don't want to limit the initial distribution to just 5%, because that would make them into an 'elite' with an overwhelming advantage in later Proof-of-stake mining. So that's a requirement I was considering which I think I'll have to drop.