poloniex has assets on its trading platform. you can trade the nxt asset jl777, or you can trade the bitcoin asset counterparty
the prices are independent of the overlying network they run on (also jl777hold wasnt a burn scenerio it was ipo)
so if people start using crave a lot, and like whatever asset exchange is built to use blur. then blurs price will be whatever people are willing to buy it for. likely if theres a healthy and heavily used asset exchange built off darkpool the price for blur would increase
having burnt the a crave to get 5 blur implies an initial value of 37 cents for 5 blur at current crave rates. but there is nothing to say whether the price will be higher or lower.
if poloniex added blur and there was no useable asset exchange and all you could do was move blur around the price would likely be less that 37 cents for 5 blur
its important to keep in mind the markets being designed by ICM are not going to rely on blur in any way.
darkpool blur asset exchange yet to be developed will only rely on crave as its blockchain to move around transactions. and use blur as its primary value token for issuing holding purchasing selling assets.
*edit
PS anyone can invite themselves into the slack. https://cravecoin-slack.herokuapp.com/ its slowed down like this thread a tiny bit, but im sure we will all have plenty to talk about when the next pieces of the roadmap are delivered.