title: Amazon EC2 hidden costs?
body: <p>I plan to move my web site to Reserved Instance c3.xlarge Amazon EC2. However, after playing around for just a few hours with the Free Tier Usage, I already got charge for about $2.65. Although this is not much, I'm considering what happen if I already purchase the 3-year term and get a lot of hidden charges every month. Need advice of what I should prepare to avoid these hidden costs.</p>
  
  <p>My biggest concern is with the first 2 million I/O charge (after the Free Tier Usage ends in one year). Also the Provisioned IOPS EBS ($0.065 per IOPS-month provisioned). With just a few hours trying this new toy, there are already so many IO occurs. Wondering how much the IO if the site is hosted here with EC2.</p>
  
  <p><img src="https://i.stack.imgur.com/ipHwh.jpg" alt="enter image description here"></p>