The upcoming bonus interest period should attract buyers. I just pointed this out on the Poloniex trollbox; more voices needed there!
Ok, let's do the math:
Say you have 100 UVC at the beginning of the 3-month bonus period (= 62 days, 8.5% annually) you got 101.395... at the end. Yellowcoin had a bonus period of 10 days at 10% daily. That means that after 10 days your 100 coins become 259.374... Big difference isn't it?