We strongly prefer that you host the images you use on your profile on mygirlfund, but if you need to host elsewhere, you are allowed to use only tinypic.com. Why? Because when you host an image, a link is created that can be viewed by right-clicking the image and/or looking at page source. That link reveals information about the account you created at the hosting site, which may lead to the discovery of your identity. It's the same as sharing personal contact information.
Tinypic.com allows you to upload an image anonymously and the link created shows no trace of you. Do not create an account when you upload there, just upload anonymously.