I’m remember getting double ISO for a few days a season or so ago and haven’t seen it in a while. I think you should bring it at least once a season imo. Especially since your prices for ISO r outrageous and 50-500 ISO after u win a match is useless.
The answer is Deadpool Daily Quest
Wasn’t that the Anniversary event that had the double ISO? Could be a while before that comes around again.
Of course with the absolute flood of 
covers that the DPD provides, ISO is now definitely much more in demand for me.
It is n high demand and I assume that’s y the prices r outrageous. Deadpool daily is 3500 and that’s if u have the required character. Oh well.
Anny week was double iso, but they also had 2 or 3 events with experimental double iso between anny week and the start of DDQ. Sorry, don’t remember exactly when
You’re forgetting about the tokens.
What about the tokens? For ISO? That’s not entirely true either since u can get two covers u actually need