You can't do much until an IPO happens, unless you think they'll have some big public mistakes / downfalls (which cause a lot of users to leave) prior to that i

You can't do much until an IPO happens, unless you think they'll have some big public mistakes / downfalls (which cause a lot of users to leave) prior to that in which case share price of its competitors may go up (Apple Music, Pandora, possibly Amazon/Google).