The plugin is Webay by wemiura. (https://wordpress.org/plugins/get-your-ebay-feedback/) The demo version limits the number of reviews to 5. I want to bypass the demo limits. I have combed through the php files, but can't seem to find the right code.
Here's the plugin: https://www.dropbox.com/sh/7poqn9g9hr404ki/AAC2lwfW7uyNrv-yleWqRzAna?dl=0
Since it's GPL licensed, I don't think I'm violating copyright in posting this. If someone thinks that's wrong, let me know and I'll remove this answer.
I haven't tested this (I can't be bothered setting up an API ID), but I'd try the following:
Delete this code from ajax.php (2 copies) and cron.php (1 copy)
$wpdb->query("DELETE FROM ".$wpdb->prefix . "wm_get_ebay_fb_table
WHERE id NOT IN (
SELECT id
FROM (
SELECT id
FROM ".$wpdb->prefix . "wm_get_ebay_fb_table
ORDER BY CommentTime DESC
LIMIT 5
) foo
)");
In widget.php and shortcode.php, delete if($tmp++ < 5) (don't delete the trailing {). Looking at the code, it shouldn't change the logic to do that. If I'm wrong, though, and it does break, change it to if(true)
I don't know if there are any other changes needed, but I think that'll do what you need.