Internet Radio Failing to Find Support?

SLASHDOT.ORG: WOXY, one of the Internet's larger radio stations, has announced that it will soon implement a monthly subscription fee, to support operations. When the Cincinnati based station went from terrestrial broadcast 97.7 to Internet only, they vowed to keep their streams free to listers. Now, they are saying that increased broadcast taxes, falling advertising revenue, and the overall uncertainty in the market (local or global?) has pushed them to change their business model. Is this a sign of things to come for the other radio stations, that broadcast over the Internet? Will digital music distribution fall solely to giants like XM and iTunes?