Free Telegram channel analytics
Before buying a post or agreeing on a swap, check a channel's views per post, reactions, engagement rate and subscriber dynamics.
Disclosure: I'm on the Trigram team (https://trigram.site). Trigram has free public analytics and channel rankings, and Trigram Lens, a free Chrome extension that shows these stats right on t.me pages.
Analytics: https://trigram.site/en/analytics
Lens: https://trigram.site/en/lens