With all the bad taste left from removing fruitful missions and their payouts, why don't you stop this trend of making your players unhappy by increasing the payouts at CG events?
Personally, I think this game forcing people to adopt the policy of rebuy or bye bye makes things particularly volatile, so I would suggest at the very least doubling the awards, if not increasing the payouts at CG events three fold.
CG's in open come with many risks. Typically you are guaranteed to come across the gank squads and arguably suffer a rebuy or two if you do not escape them. For me, personally, I have poured many hours into this game across three platforms and have plenty of credits and experience to look after myself sufficiently, but what of the other players who are quite new and seeking a means to develop their fleets and retain an acceptable safety net of credit balance?
If you continue to take away appealing and fruitful means of earning credit in the game then what's left for the player to do when essentially money making is a major factor to remaining motivated in the game so that people can actually then enjoy taking more risks to explore dangerous missions or tackling the aliens etc and having more freedom in the game to simply go and have fun.
If it were upto me I'd particularly increase the awards in open play since open play is where the biggest risk to your ship is posed. CG's in particular are quite unbalanced where a solo player has a distinct advantage and exclusive access to rings for bounty hunting etc.
I think ultimately with the amount of work, the time invested and the risks taken when participating in CG's warrants a greater payout award. If a player loses a Cutter or Corvette at the cost of around 30 million then the top 10% award doesn't even cover that. So there's why I'm making this particular point.
CG's are the perfect activity to encourage players to play in open, working together, and to officially make it the go to GOLD RUSH activity, counter balanced by the risks taken, so it all makes sense awarding such participants something worth their while, wouldn't you say? A cool 80 million for a top 10% would be nice. Top ten players, a cool 100 million credits..
Personally I'd prefer CG's and Powerplay to be open only modes for balance sakes, but that's just me. Being unable to do anything about someone undermining your power makes little sense to me... But that's another topic. Lol.