Seal
Lock ETH against a hash of your real bid. Add cover and even your deposit stops giving your size away. Nobody can read a bid: not snipers, not bundlers, not the dev.
Break
When the window closes, the seal cracks and every bidder reveals their own bid. Cover comes straight back. A bid that's never revealed doesn't count.
Price
One price for everyone: ETH raised ÷ 500M tokens. Bigger bid, bigger share, same price, whether you sealed in the first block or the last.
Pool
The raise seeds a pool that's locked forever, opening at exactly the sale price. No LP tokens, no way to pull it. Tokens the pool doesn't need are burned.