8m gold per day at TH9 was certainly possible back when I was TH9 - it is what I used to do every day I played...It took all day though and a good chunk of the evening! (Non boosted)
Same player - me - was not able to get anywhere close to that at TH10. I guess I was bashing a lot of TH8 when I was a TH9 cos my loot plummeted at TH10. 4m a day is now fairly exceptional - mainly due to the fact I give up trying after an unnecessarily long next session...
Raided first thing this morning...too many nexts...not raided since. Thats how clash is right now...want to play - but dont because nexting sucks

