Yes, this is surprising. Twilio has a reputation of being awfully transparent -- they had a billing systems issue back in July and handled it quite well, IIRC. They also do a great job with their developer evangelist program.
I wonder if someone has created a pricing matrix/table that updates and compares the SMS/voice API providers. For example, I know Plivo is slightly cheaper for SMS, domestically (USA). A price comparison table might make a good holiday project :)
Although I understand this wouldn't help your case. As you pointed out, the SMS provider would have already increased rates by the time you could be notified of increases.
I wonder if someone has created a pricing matrix/table that updates and compares the SMS/voice API providers. For example, I know Plivo is slightly cheaper for SMS, domestically (USA). A price comparison table might make a good holiday project :)
Although I understand this wouldn't help your case. As you pointed out, the SMS provider would have already increased rates by the time you could be notified of increases.