Don't do it to yourself.
Some (most?) of models won't work for free credits. Which ones? No idea. The only way is attempting to generate an image and seeing 'This feature is unavailable with your current plan' or not.
Pollo Image 1.6 is godawful. And when you attempt to delete stillborn disasters generated by aforementioned model you get another 'This feature is unavailable with your current plan' pop-ups. (Thankfully gend get deleted.) I managed to generate something serviceable with GPT-Image-1, but inability to make the gen private (unless you pay) made me delete it. Highly unrecommended unless you enjoy a sour taste in your mouth.
Reply from Pollo AI
Hello,
We apologize for the inconvenience caused by your poor service experience.
1. The credit requirements vary depending on the model. You can check the required credits before using the model. Once you have the required credits, you will no longer be unable to use the model. It's likely that you don't have enough credits. You can earn more credits by checking in, etc.
2. Since you don't have a membership, if you don't need to post videos or photos, you can delete them so they won't be uploaded.
Thank you for your use. If you have any questions, please contact our customer service staff.
We wish you a pleasant stay.