This typically raises the growth versus revenue debate. Do you continue as is, adding users or try and monetise, risking alienating users. There have been some

This typically raises the growth versus revenue debate. Do you continue as is, adding users or try and monetise, risking alienating users. There have been some smart sponsorship/advertising concepts that have worked well on free sites. Kaggle comes to mind. They hold competitions for members. Usually sponsors throw in cash prizes and job offers. So an American Idol YouTube competition with a prize to headline a big concert may work. Drives traffic and maybe some revenue from companies rather than users.