Trust me on this, nothing is worse than waiting more then 90 day to get paid $50. I've been burned by networks with ridiculous payment thresholds and sketchy payment schedules.
Consider that the minimum payout threshold and payment frequency. There are some networks that only pay monthly payments of $100 minimum, while there are others more than $500.
Most programs have a reasonable minimum under $100 and monthly payments. PayPal is usually your best bet for international payments, though there are some premium networks only do bank transfers.