Possible to Promote a White Label?
 

What I mean is.

If, for example I currently promote Streamate or LiveJasmin etc and I saw a white label that looked better. Could I promote the white label and get paid by the sponsor.

no, not getting paid by streamate - if the WL owner set up his own program/payouts, then you could do it and get paid by the WL owner, but not directly by streamate.

LJ - no idea.