𝗠𝘆 𝟰,𝟮𝟬𝟬 𝗗𝗼𝗹𝗹𝗮𝗿 𝗔𝗣𝗜 𝗠𝗶𝘀𝘁𝗮𝗸𝗲 I thought my API was safe. I installed rate limiting. My tests passed. Then someone scraped 2 million requests in 4 hours. It cost me 4,200 dollars.