Is it permissible to take paid images that were published for free after being purchased by others, or must they be bought from the original website?

There is no objection to benefiting from a picture that does not contain a Sharia-prohibited element, and giving it to others for a fee or without a fee, or placing it on the user's page; this is within the limits of what was agreed upon in the contract between the user and the source of the picture.