Today I was orders to check out one of our applications. Accounting said that the Twilio bill was constantly increasing even if we do not get any new clients. In 10 min I found out what is the problem. All calls are recorded and stored in Twilio, which charges handsomely for such service.
Developers instead of downloading those recording to our data lake, use Twilio as storage, because no coding was involved.
Company lost around 30k dollars this year and around 10k-20k in previous ones, because someone was lazy to spend few days to download mp3 from url.