Errr... yes and no...
In FASE 2 payout was shared across all partecipant, so you'll get payment even if all you have done was moving boxes and that was great becouse keep engaged even new player or people that are not into combat. In addition while you ware repelling the XenoThreat Idris at Jericho station payment bar was going up for very damage inficled even to Idris shields, add this to the shared payment and you'll end up with 2500aUEC every few seconds. Personally during one FASE 2 I've ended up with about 600k since there was a lack of torp and the Idris keep soaking damage with the shield and so the payment keep filling and the cash flow...
In FASE 3 instead payout was personal, so your payment bar progress only based on the damage that YOU inflict to the Xeno Idris and only for actual damage, shield doesn't count.
Escort fighter payout a negletable amount, about as much as a standard "call to arms" mission with the eception that only the confirmed kill payed out, so if a random guys shoot you target down he got payed, not you.
BUT if you ware piloting a torp ship (Eclipse or Retalliator basically) you'll end up with a freaking amount of money since every S9 torp that hit the Idris will basically grant you a big sum (and landing a hit wasn't that difficult...), but in any other case you'll everage pay count was stopping at around 30-35k considering the whole mission (single escort taken down and final payment).
For comparison I see in chat several player claiming they had raised 600-900k per event.
I've done FASE 3 event a couple of time, but considering how boring it was associeted with the low payout for non torp ships and the hight risk of getting a crime stat do to other players cutting trought you line of fire I quicly move back to ROC mining: less problem more payment (a lot more payment in fact).