Like Drak already said, the IPO money is his own money. He never said he was going to use it for development or advancing the coin. He had the presale just because 1) he doesnt work for free and 2) he thought this is the only way to have a fair distribution of the coins.
Basically when you bought the IPO, you bought the coins that DRAK was selling you. It was a presale, not a crowdfund or a fundraising or anything else. Basically you paid that guy $360K for VIACOIN.
Although he did use some money to hire Peter Todd and continue to work on the coin. I think the only reason he is still around when most other altcoin devs have left, (besides the obvious reputation hit) is because he isnt depending on the price of VIACOIN. HE already had gotten the money from it, so right now he is like a kickstarter developer. All the money upfront, so he can stay and work in peace without having to worry about wtf2do and hype/pump the price.
Thats as clear answer as you will get. Drak wont come and say this with these words because he is more diplomatic in his aproach, but that is the general idea.
So bottom line, those 600BTC IPO funds, as soon as the IPO ended were his own money, not the project's money.
You gave him that lump sum of money and he can do as he pleases with it.
He obviously used some of that money to advance Viacoin, hire Peter Todd, and continue to work on various VIA related projects
He is continuing to work on VIA, aka he didnt leave the coin or bail from the project, and he will probably continue to spend as much money as he needs on various new things that will be needed
Thats all there is too it, and to be honest, i am not sure what else do you want Drak to say about this matter.
TL;DR
1) IPO money is drak's own personal money
2) IPO money is not exclusively VIACOIN project money although some money was spent on VIACOIN
3) Drak has a high developer hourly rate
4) There wont be any buybacks, give back the IPO money (there isnt any IPO money anymore, all the coins got sold a long time ago on the exchange, remember personal finances)
5) Drak has delivered on the tech part, so he cant be called a "scammer"
6) Technology has no relevance on Price. He doesnt care about the price, because he isnt invested in the financial part (because he already got paid from it, and if he was smart, he probably made a fuckton on the 2 rises upward + the zynga pump)
7) QQ more
Can we get another dump to 200 sats plz tnx