I don't think the error is related to the number of images and requests. I just created a topic in the Archival board and added a table with only 10 casinos there. There are problems displaying the images and rates there as well. Sometimes they load just fine, other times there are image errors.
https://bitcointalk.org/index.php?topic=5522385.0The real questions is, how did it work in the past and what changed in the meantime? Could be server-related, a Cloudflare issue, a new setting that needs to be configured, or some other software-related change.
Could the forum be causing the errors? Perhaps it's time to tag @theymos in the discussion and see if he has any ideas.