100 per concert(which was upgraded to 250 for the extended stay since bercy)
as for mabanga it depends,there are three systems about mabanga in groups, either you create your mabanga guys or benefit from the guys you found in the group,either you give shoutout with leader permission with leader then "authorizing" the guy to give you something,or another case which is mainly 2 artists i prefer not to name do not approach anybody they mention or you'd be doing mabanga for free,unless they exceptionally allowed and you'll get "something" (so in those two cases the guys give something undercover because when the leader hears most of the times they are upset)
sometimes the donor will tell the leaders i want my shoutout in animations instead of you the boss doing shoutout during the generique so either the leader will that money then hang lets say 100 or something to the atalaku or they will chew everything ,with the atalakus having to go and beg to the guy again explaining that he received nothing but please dont tell the boss that i called you i will even mention you for 5 straight concerts for free to make up,for example