Blurry image previews after JPEG uploads

[fellow1]

Hello. I came from other stock, but I am having some problems with preview quality here. Would be grateful if anybody could help me. My preview images become blurry after i upload a zip folder and after they are accepted for sale.

[Abambo]

If they get accepted, they are ok. If they get refused, you should give more information.

May be a you could show us an example?

[Nancy OShea]

Preview images are always lower quality than licensed ones.