Robinhood Chain · Uniswap v4
Liquidity laid as a staircase.
The pool's share of every token is laid as eight narrow treads with empty gaps between them. Price stalls on a tread until it is bought out, jumps the gap above it, and stalls again. Nothing can take the liquidity back out.
One transaction
The supply is minted, the pool is opened against native ETH, and the pool's share is cut into the flight. Nothing is charged at the door — raise is not even payable, so a launch fee is something this launchpad cannot collect rather than something it chose not to.
8 treads
Instead of one wide range, the pool's share becomes 8 narrow bands with empty gaps between them. Price stalls on a tread until it is bought out, crosses the gap above it meeting no liquidity at all, and stalls on the next one.
No way back out
The contract holding those positions has no withdraw, no decrease, no owner and no upgrade path. A tread that has been bought out holds ETH inside a position nothing can empty, so it stays under the price as a bid belonging to nobody.
What the gaps do
Between two treads there is no liquidity whatsoever. A buy that finishes one tread crosses the gap above it for almost nothing, so the price moves in jumps and a trade sized to cross a gap moves it a long way on very little money. That is the mechanism working, not failing — and it is why a trade here carries the furthest up the flight it is willing to climb, not just a minimum it will accept.
A flight whose price never climbs never sells its upper treads at all. They sit there holding tokens nobody reached. This is written on the page rather than buried in a document, because it is the honest cost of laying liquidity in steps instead of a slope.