You can now decide which types of images get compressed using the automatic mode.
1. Open Crush.pics and click Settings
2. Under Automatic compression setting, select which types of images you'd like to be automatically compressed
Product Images - Images you upload to your product in Shopify but not images in product descriptions.
Asset Images - Images stored in the theme
Custom Collection Images - Images from collections that are manually created
Smart Collection Images - Images from collections that are created by automatic rules
Blog Post Images - The featured blog post image that shows on a post's thumbnail. Images in the actual blog post will not be compressed.