I guess it would depend on how your users consume services. With Twilio it's easy because it's by transactional events like SMS or minutes. So you could load yo

I guess it would depend on how your users consume services. With Twilio it's easy because it's by transactional events like SMS or minutes. So you could load your account with $20 and Twilio would just take from that based on the transactions that occurred. And if you ran to $0 then yes, they suspended your account.