If I am not wrong, instead of writing a cronjob, this extension uses a frontend visit to checkout if there are post to be forwarded to the social channels.
I contacted support two times, and both received clear explanations to fix my misconfigurations.
It is worth its cost.
Thank you very much! We appreciate your evaluation and feedback.
I personally don't like those two styles with rounded corners, but it is personal choice.
I test displaying gallery from joomla image folder and it worked like a charm.
Also, it is ready to support multiple galleries within a page, so you don't have to worry.
Thumbnails are resampled, and it is responsive.