This is not necessarily an endorsement for free image hosting by servimg.com, but I'm passing along what I know based on experience thus far.
When we created our Forumotion account and used the servimg.com free image hosting, we created an account with servimg.com as well using the e-mail address for our Forumotion account. I wondered exactly where all my images I uploaded were hosted/placed?
I went to the servimg.com home page and attempted login using my Forumotion credentials. It didn't work indicating I had the wrong password or e-mail address. I choose the option to reset my password and enter my e-mail address used for Forumotion. In a few moments, I received an e-mail with a link to acknowledge along with a new password. It worked.
I then updated my profile with relevant information and saw all the photos I upload since joining OSF. The display and features are very basic. Servimg.com also provides an option to delete the account as well.
I like what I'm seeing thus far and I may use this an another choice/option for photo hosting. I don't know what the hosting capacity limit is based on what I read thus far, but I figure I'll get around to it.
If any of you have used servimg.com for image hosting, I hope the information helps.
If any questions, then post it here and I'll see if I can provide any further examples/screen shots.