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You might not realize just how expensive SMSes can be. Based on AWS SMS pricing, they cost 6/10ths of a cent to US destinations each, so each deal sent to 90,000 people in the article would cost twitter $540. That's not even getting into Europe that can cost over 10 cents per SMS, but I doubt twitter supported that.

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>>> Europe that can cost over 10 cents per SMS

Not my knowledge.

SMS prices in Europe varies from country to country, but I would say that they are, on average, around 3-4 cents. You have cheap countries like Portugal (1-2 cent), intermediate countries like Spain (2-3 cents) and France (3 cents) and expensive countries like Germany (6 cents) or Belgium (6 cents).

From the top of me head, Azerbaijan is the most expensive country in the world, at 10 cents per SMS.

Source: Running a SMS hub in Europe for the last 15 years.

It sounds like Amazon is adding quite a surcharge onto their SMS, then.

https://aws.amazon.com/sns/sms-pricing/

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