If you have a big site on which you want to integrate Placid, you will have to generate a lot of images at once at first. A Placid Business Subscription will make sure you get your own worker on our servers that is in charge of generating images only for your account. Else, your image will be queued, but is usually generated shortly.
We are keeping the last 500 of your generated images in our image cache. Older images will be re-generated when they are requested again. If you plan on creating more images for a bigger site, we recommend to store the generated images on your own servers.
If you're still worried, write us a mail on firstname.lastname@example.org and we'll see what we can do to optimize the speed of image creation when you need it ✌️