If you want to know what's the point in having walls on the opposite side of what you are doing, the benefit is twofold:

- The price can be pushed higher. It is only between 0.5%-1%, but it adds up when making a large trade.
- The volume can be induced. Bitstamp was dead before the walls, but then there came so many traders that I could sell BTC300 in 40 minutes with positive slippage (while trolling the forum ofc)!

In total I made about $3,000-$5,000 by not crashing the price to 850. In another kind of circumstances that would have been beneficial due to the panic effect but now it does not matter; bitcoin is overvalued and it will slowly come down in the timeframe of 1-3 months.