The BTC is for development purposes not for manipulating the market. We will let the free market decide the price. Thus, not putting up a buy wall.
There is of course some logic to this, but when I say a buy wall, it's not like you are supposed to keep it there forever. I forget how long the LCL guy kept it up (not long, as his weird double priced ipo didn't work out so great), but just enough to be a safety net. If things turn really sour, really quickly, at least it's a way out for those who invested. At the same time, if things go well, the buy wall won't even be hit.
It's basically betting on your own coin. If you don't feel confident enough to offer a temporary buy wall, why should people feel confident enough to invest?
Of course not all ipos needs to do the buy wall thing, but to be honest, there are a number of red flags for this ipo. And if an ipo doesn't even sell out, it's not a great sign as far as how the price will go.