I oppose pre launch public auction, as that means 400 BTC IPO is going into someone pocket at current prices.
If developers want 400 BTC more, why they also need 15% stake too (which is 600 million Nem)
Im thinking quite same, what is the purpose for collect more BTC ? Otherwise, could we use that money to big marketing campaign or made bounties to new devs ? Or just share all btc with old stake holders

It's basically designed to collect even more money.
So first we had an IPO (which we are not supposed to call "IPO") that collected 60+ BTC and several thousand Nxt.
Then we will have a second IPO where 200 more stakes are "auctioned" again for even BTC, this time at muh higher prices (potentially 400 BTC).
Double the fun.
Then 15% developer stakes and 10% more reserved for future (25%) -- and no answer on what will happen to unclaimed stakes that could be as high as 25% more (making 50% controlled by "developers")