Proportional ICOs are great when a lot of people participate. It gives the best distribution to those will to take a risk in a project. They take a big risk and it could go either way.
Yeah it can go either direction but it is pretty much good and sure to get Profit to buy them when they are 10-12 satoshis.
There is big risk and usually not profitable until you see a lots of Pumps in the ICO .
I recently buy YOVI (ICO) at much higher price and now i dont see much pumps , and the amount was pretty much spent in buying+Taxes , so i dont think any profit in near future , moreover if you have bought ICO at 5-10 satoshis then it would be much better then.