Smush

Hello. I started using your image optimazation plugin Smush. If I decide to cancel my wpmudev subscription, then can I still use Smush? I'm asking that because if I can't use it, then I will make copies of original photos, but if I can still use it, then I don't have to keep original images.

Also, I have same question regarding WP Hummingbird and SmartCrawl