SIT主动催我交占坑费了……500刀啊，一个iPad的钱……

3月30来的ad, 说30日之内交占坑费。但是今天早上我收到个邮件，让我尽快交钱。里面有一句话“seats are limited and reserved on a first-come, first-served basis. In order to secure your seat for the upcoming semester, you must complete your admission reply form and pay the $500.00 enrollment deposit via your application status page.”

难道即使没到30天，也有可能会提前没有我的位置了吗？