Do Pennsylvania residents have to pay taxes on sweepstakes winnings which are not gambline or lottery winnings just a prize from a business contest?

Yes....and lord knows how you draw the line differently from a sweepstake or lottery. It isn't how you won it, (a card game, slot machine, buying a ticket, or having a number drawn out of a hat) it is what it is - winnings. Winnings are ordinary income. You will pay taxes at whatever rate is determined by your total taxable income. If you can itemize, gambling losses are 100% deductible up to the amount of winnings. Don't forget those lotto tickets!