NuShares did something similar and it ended up being a disaster (just in case you guys think this is the first time a crypto has done buybacks, it's NOT).  It centralizes all the value inside of ICN. When you were getting dividends in Ethererum, your value was gained outside of the ICN network - which is good. Now if something goes wrong with ICN all value is going to be gone.

I guess you can just slowly sell your ICN as the price rises to avoid the risk..