I don't check child boards anymore. Because when I first discovered about the Indian board, I went through all the child boards, but they had zero new threads and replies.
I monitored them for a few days but didn't find any responses. Even when I created new threads on the child boards, I did not received many replies. Since then, I have not considered checking the child boards.
It's a good idea to enable the telegram notifier so that if a new thread or reply is posted, we all will be get notified.
I do not use Telegram notification but I have been using the Bitcointalk email notification lately. It is a bit slow but delivers what is required from it, I got a notification today from the Off--Topic sub-board about this topic:
Let's Discuss About Movies and TV Shows!. I feel that we need to create a few more threads like this one created by pakhitheboss to make other ones active. Marketplace, mining, buyer/seller, and regional language are useless whereas in altcoins & news one can have a single thread like the one created on off-topic.