This seems pretty useful, but pricing seems off: $0.005/message works out at $5 for 1000 messages. Which is a lot considering half of these sending methods could otherwise be sent for free using a $5/month server, and it looks like. If we used this for push notifications, this pricing could easily exceed our entire monthly spend on infrastructure and SAAS tools!
Reading the docs, it was also ambiguous to me as to whether I would need to pay the fees from the providers on top of your fees.