Don't take many concert images & AFAIK this isn't "big name" group,
but this strikes me as kind of image that gets copied freely & posted
on Internet leading to unauthorized usage by legit publishers...?

Am doing no detective work, so am offering 20% of my net COLLECTED
[unauthorized usage fees + associated penalties] as finder fee for each
case that someone supplies me with enough info to pursue personally or
via attorney. My own time = $0, my chasing limited to ~$500 net & up,
so don't bother with blogs/websites by minors, etc. Post info to this
thread (plus me) so who reports first in each case is not disputed.

E.g., you find unauthorized use & I collect $500 net, I send you $100;
you find unauthorized use & I send info to lawyer who gets $6K settlement
& takes 1/3rd giving me $4K net, I send you $800.

If anyone wished to take on all aspects, do chasing, too,
(except all collections must come to me first)
then 30% of my net is offered.

Maybe this is way for "stock photo cloud" to turn lemons into lemonade...?
Will report all actions (tipster's name not revealed unless requested) in this
thread in an attempt to create a "chaser's tutorial". Suggested modifications?