Personally, I prefer a cheap paid Imagemagician or Ranchoweb image service. Very reliable, unlimited bandwidth, la-de-da!
I went onto my account and came up with these few answers.
What are Account Limits Each free account has a default limit of 5MB of daily file transfer bandwidth, and a limit of 50MB of images. No individual image can be over 60K.
Paid accounts have a varying level of maximum daily transfer, depending on the plan.
Daily bandwidth is calculated by multiplying the size of each image times the number of times it is viewed. If you have a 100KB image showing on an auction page, and that image is seen by 10 people, that equals 1,000KB of bandwidth use. Each 1,024KB of bandwidth is one MegaByte, and the default bandwidth limit for free accounts is 5 MegaBytes.
When your total daily bandwidth usage exceeds your account limit, images will no longer be served from your account. Instead, a default image, with a message about exceeding daily bandwidth limits, will be displayed in their place.
Keep this in mind when you're uploading large images--big images with little or no JPG compression will use your bandwidth very quickly. Try to use image or photo editing software which will allow you to save images with a specified amount of JPEG compression. The higher the compression level, the smaller the file size will be. The highest levels of compression will introduce a loss in image quality, so you'll have to find a balance between image quality and file size, usually by trial and error.
An important factor is to make sure your images aren't oversized (in pixel width and height), or that the file size isn't too big. See the Image Utilities or Optimizing Bandwidth Usage sections below for help with image manipulation and optimization. We also have a resize feature on the image viewing page.
Also remember, you can monitor your current daily bandwidth usage on your account page.
How Do I Prevent Other People from Using My Images? Any time we deliver an image to an external website, it will affect your daily bandwidth usage. If even just a few people were to take the URL to one of your images, and place it on their own website, it could use your daily bandwidth up very quickly.
We have a feature that will allow you to enter a URL to a page on which an image is authorized to be shown. Enter a portion or all of the URL to a webpage (or auction) where you plan to insert an image, and only that page will show the image.
Why Do You Have Bandwidth Limits? Many image hosting services charge a flat rate per image, and assume you wont get too much traffic to any one image. Most of those services also put strict limitations on the size the image can be. We allow you to control, for the most part, the size and quality of your images, but leave it up to you to use discretion when your inserting images on external websites.
The biggest cost factor for any image hosting or web site hosting service is "Bandwidth" and "Data Transfer". Data transfer is measure by the size of a file, and how many times it is delivered to people viewing your images on other websites. That is the single biggest cost involved with internet hosting.
Companies that aren't setting bandwidth usage limits according to the pricing plan, normally 1) place strict limitations on image sizes, and 2) assume most people won't use that very much bandwidth, or 3) are hiding a data transfer limitation in the fine print. Feel free to look around and compare plans from other image hosting service providers.
Several very large image hosting services have gone out of business in the last year because they weren't matching their costs to their prices. Because we buy our bandwidth in bulk, we are able to structure pricing plans that are affordable, and do cover our costs, which helps ensure that we'll be in business for years to come.
I also found that their paid accounts aren't that expensive, with their largest account toping at $16.50 for 1200 images at a max size of 3MB. You also get 400MB max Daily Transfer, unlimited eBay Usage, and 5 Web Pages to use at your own will.
I don't think that's too bad. If I had a credit card I'd get it, but I'm not in the mood to sign away my soul... LOL! ;D