CLOUDINARY is increase usage limit for their FREE plan. SIGN UP now and get following benefits at free of cost. If your usage increases, later you can switch over to paid plans, but with lesser cost.
20,000 Monthly Transformations
300,000 Total Images
10 GB Managed Storage
20 GB Monthly Viewing Bandwidth
With same image files, you can easily build responsive websites. And, site load time increases due to image optimization by Cloudinary.
Don’t forget to download their WordPress plugin, to work fast.