Telegram was allowed to read the private channels with no subscription!
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For top conversions with ads in the last year it has become popular to create closed channels and long-established public, many authors have translated the private.

Readers can't view the contents of a private channel without the entry than was used by advertisers to create clickbar advertising. Now the private channels are becoming less closed and within 5 minutes you can view the content in this channel.

Read more: tginfo.me/peek-private-channel-en

Translated using Yandex.API