How can I check if a new pop network is reliable before spending money?

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Before spending money on a new pop network, it helps to do some basic checks. Start by looking at reviews or discussions in trusted forums to see what others are saying. Try to find out if they offer clear stats, good support, and traffic that converts. Most good networks also let you start with a small daily budget, so you can test without losing too much. Check if they allow you to block bad sources or filter traffic. A test run with tracking in place can show if the clicks are real or not. What signs do you watch for when testing new networks?