If there is, I haven't seen it.
Yes, can set your campaign's daily budget to 0 to pause it.
Automatically sending coins from our balance to our non-funded campaigns might need some more thought. One of my ads which I want to be paused right now automatically started advertising itself again!
If my campaign has zero coins in it, this meant before that the ad was paused until I added more funds, but with this new coin top-up change all of my campaigns flipped the on switch without warning and spent funds in a way I didn't approve of.
If I wanted my campaigns to have automatic top-ups, I would have set my publisher ads as "pay to campaign" instead.
Now if we hold any balance in our accounts, we have no control over a maximum spend on our ad campaigns, unless we go back in there afterwards and manually set the daily budget down to nothing.
Thanks for pointing this out. You are right, we should have thought more about the transition process. Existing users might not expect that their zombie-campaigns become active. I've set daily_budget to 0 for all campaigns that are older than 1 day and have a low balance, so it shouldn't be an issue any more.
If the funds of your user account were spent on your old campaigns that you didn't want to run then please drop an email to [email protected].