How to tell if an ad network is going down?

Before switching to a new ad network I’d like to know how long it will “be alive”.
(So that I don’t lose revenue if it goes bankrupt and stops paying).

I think these are some features of a bad network:

  • lots of job offers on the website (everybody is leaving)
  • bugs in the sdk (the programmers left, nobody can fix bugs)
  • appeal to emotions rather than logic.

Is there anything else?

Delays in payments

Agree with mmmkkksss. Delays in payments along with the fact that you’ll see a lot of developers complaining about it on forums like these.

How long have they been in business. Your pretty safe if they’ve been operating a few years and noone is complaining about non-payment, banned apps etc. I don’t trust any new ad networks at first.