escrow address was funded
(2017-05-26) before the chipmixer address
(2017-08-16). makes no sense to me in this order.
EDIT: it's more an indicator that cipmixer created this escrow address and not the campiagn manager. or they are both the same.
It doesn't indicate anything of the sort. Chipmixer may have created their "1Chip" address 2 years ago... or the day it got funded, there is no way to tell from simply looking at transactions on the blockchain.
EDIT2: if this chipmixer address has an operational need (which it has) then you will create and fund it with the start of the operation or before. after your business is working and you have too less customers your are thinking about to improve it. then comes the escrow address into the game. in this order.
You would not necessarily fund it, if the "operational need" is that it is simply used to create signed messages. You don't need funds in an address to sign messages.
It is fairly obvious looking at the transaction history for this address, that it isn't an "operational" account at all. It has had 2 incoming transactions, which occurred 3 months after the Alpha tests and the service was opened. More likely, someone liked their service and dropped a donation instead of using the internal "donate chip" option.
Without knowing the actual details... I'd say that Chipmixer saw that DarkStar_ had created the "1Chip" address to escrow the sig campaign funds, and liked the idea of a vanity address so went and made one for themselves.