As a free user, you can upload 20+ images (maximum 2MB) until the 40MB limit is reached.
Lite subscribers have a 100 MB limit.
Pro subscribers have a 1024 MB limit.
As you can see below, you can see the Uploaded Images section to view how much space you have used. :)
We're very sorry that more personal image upload space is not an add-on feature at this time. We thank you for your patience as we continue to improve! :)