We regret to inform you that the wp fastest cache plugin will no longer support the photon feature.
We received an e-mail from WordPress warning us about this issue. As stated in the Terms of Service, the use of the photon feature in other plugins is prohibited.
Use of this service is for users of the Jetpack by WordPress.com plugin only, and may be used by sites hosted on WordPress.com, or on Jetpack-connected WordPress sites. If you move to another platform, or disconnect Jetpack from your site, we can’t promise it will continue to work.