Here you make first mistake :
"take on 1st account 4 missions for 50 mils payout for gold" - lol, you won't get 4 gold missions at once. And for sure not even from the same station.
Secondly: - math will kill you:
"gold, which i can buy!"

- then IS NOT any more 50 millions per mission but 30-35 only. ( gold price is between 40-50 k / tone ! ) - or you know a trick and some stations give you some 2000 tones of gold for free ? !


- to buy ore for 4 missions of 50 millions is AT LEAST 30-40 minutes, since that means some 800-1000+ tones ! ( only Gold mission s the exception, but that is rare and to get 4 of them at once is a wet dream also.
"20 mission for 5 bils!" - nop, that is 20 x 30 (35) and that is just some 7-800 millions NOT 5 billions !



. Do not mix here the account profit with the TEAM profit ( 2 or 50 guys/accounts) ; We are talking about ONE person, right ? And not about a team of 5-10-50 players / accounts .
And sharing a mission will NOT give you extra credits on that account, but yes, in OTHER account AFTER you log out / log in, etc.
Next step - runs to BUY and runs to unload. That take time also.A lot more than just 10 minutes.
Lets consider best case scenario: you search and get 5 missions of 50 millions for GOLD - you won't get that from just one station- you will need AT LEAST 4-5 stations.
That is already some 15-20 minutes to fly by, dock, etc.
Now let's go and buy the gold . - and will be at least 2 runs, even in a Cutter, and lets say you are lucky and you get to buy the gold from BIG stations and not from medium pads - so you can use a Cutter - that is again another 15-20 minutes. After 45-50 minutes, if ALL work perfectly ( no interdiction, no Pirates, etc) - you deliver the ore for 5 missions.
We are in the 40-50 minutes range. Now, the funy & dummy part - relog - how many times ? 5 times from main account ( you only can share ONE mission at a time ! ) And 5 times from other 4 accounts. Do the fraking math: 25 log-in / log out - at least 20 minutes JUST for that !
So after MORE than one hour you get what : 35-40 millions x 5 = 180-200 millions in main account and ONLY THAT.
250 millions in each other 4 accounts.
Important fact: NO ACCOUNT manage to get more than 250 millions in over one hour !
( all that considering you are lucky and you get not one but FIVE gold missions, ALL in 50 millions category ( never saw myself that in over 3 years ! ) AND you never got interdicted AND the station who sells you the gold have enough stock, AND is no longer than 1-2 jumps...
"P.S. and if you didn't know, if 1 account ends mission, other 3 gets each 50 mil too if it was shared mission." lol, I think I know a bit more than you suppose.
Again, the "detail" the account who shares one or 20 or 50 missions will NOT get a single extra credit from sharing.
Now, one may argue "my 200 accounts made 5 billions in 4 hours" - sure that is possible, just have 50 guys in a clan , all sharing, and the can bake 2 billions / hour ALL TOGETHER, but in this case to say " MY best run was...." is just a fake statement, right ? Cuz is a team effort and not an individual one.
If you are alone, no matter how many accounts you have, you simply cannot reach 6 billions / 4 hours / account - elementary math will laugh at you.
Again, to say """My best run was 5B in 4 hours."" is pure fantasy. Like me to say here, I make 1 trillion / hour. But the fool is not the one who drop the crap, but the one who believe....