well, seems to me, since comments are just text, storage is a tiny concern.
Fri Aug 18 12:11:06 PDT 2017 update: Do it the AWS (Amazon Web Services) way. Posts that have not had a comment in six months are put in glacier mode. It'll take longer to access those posts. But if a post has a comment 6-months-minus-one-second or younger, then it's put to "active" mode (in AWS-speak, it's called "S3").
I am not familiar with Feedly. IFTTT may also be an option for you. If you want to follow this up, you should post another question, either in r/help or r/ifttt or r/feedly, since your reply here won't automatically be seen by other users who may be able to help you.
> What is a sect?
I'm so glad you returned to reply.
To answer your question, I simply typed that into a search engine What is a sect?. True, it has a variety of definitions, but its the "cult" definition that applies here. Please bear in mind that my day-to-day language is French and in that language, the word "cult" is the meeting of a religious assembly, so hardly applicable to what I meant here and that's the reason I did not use that word. I'm aware that in Buddhist circles (for example) the English word "sect" is simply a subset of the beliefs more widely held in that faith.
(FYI, I'm a protestant Christian. I also have the greatest respect for other beliefs and religions)
Now, if I may ask you: are your the author of the video? I'd gladly reply to your questions if you are.
If anybody uses an Android device and doesn't know already, give redditisfun a try.
It has a dedicated sub: /r/redditisfun