I don't think there are campaign who are paying prominent altcoins, because nowadays bounty campaigns use the tomen they're representing as payment and as the time goes by there would be many tokens that are been developed and become prominent in the future. So if there is a campaign that would pay such prominent coin such Litecoin, Dash, and etc. it would be the prominent coin developer itself it maybe a reanimation or redevelopment or an upgrade for new development of such coin.