Stock images are purposely watermarked until you pay for them. Did you buy some stock images to use in an Animate CC project? If yes, who did you purchase your images from?
What's your problem? If you want to use proprietary licensed images and publish them in/on (Animate or otherwise) your website, blog, social tralala, you have to pay. Peng.
Maybe you look out for alternative, free image sources like Creative Commons. ?!
But be aware, even those Creative Commons images/videos are licensed under CC rules. You might e.g. have the obligation to explicitely attribute the image to its creator.
Completely free are only those images you made yourself. For yourself.
How do I add an image to adobe animate without paying, as well as not have a watermark on the image? !
Be aware that if you were to use an image with a watermark that you would be breaking copyright law. It’s illegal.