Some push ad networks do have limits on how many campaigns you can run at the same time, especially if your account is new. Others might allow unlimited campaigns, but they may pause or flag them if too many are not active or bringing results. Even if there's no fixed rule, running too many campaigns at once can affect how well you manage and optimize them. It's better to start with a few solid campaigns, then scale up when you see what works. That way, you can stay in control and avoid wasting money. Also, make sure your creatives and landing pages are different enough to avoid overlaps or low click rates. It's always good to check with your traffic source or account rep to know their rules. But in general, focus more on quality than the number. What are others noticing when running many campaigns under one account?