Here is my theory on why PvE doesn't have Tarcoins.
It's based entirely on my observations and opinions. Which means BSG could add it tomorrow and blow this to shreds like a blue F-150 full of Tannerite...
PvE is markedly easier to play. I hope folks don't think this is controversial... It's not an insult, it's just a fact of the circumstances.
I've seen rumors it's easier to cheat in PvE, though I haven't been able to confirm that, so take it with a HUGE grain of salt.
If PvE had tarcoins it would be super easy to grind them out, upgrade a standard account, then turn around and sell that account on one of the dogshit sites like G2A.
Not saying this won't happen on PvP, it for sure will, but it would be A LOT easier on PvE even if you arn't cheating.
So thats one reason BSG might restrict them on PvE. It's not cause they hate you, or because you are the sidebitch (they do, you are), it's just cuase they don't wana fund the RMT market.
This post is satirical by the way...Please don't get bent out of shape over it. It's just a game.....