Pretty much this. I was one of those waiting for LS calls, yet I knew the risk. I wouldn't demand anything when I didn't work for it. I saw a call, I went to the spot, mob is dead? oh well bad luck, try again next time. It's basically free rewards for no effort, why do people complain with this entitlement nonsense.
You're lucky enough someone is sharing the info with you, if people had to keep waiting for the whole server to arrive, marks would never die. If you think it's greedy, what do you call expecting to get ALL full rewards without lifting a finger?