Public Telegram channels leak more about their owners than the owners realize, and every leak is in the HTML you can fetch without an account. Here are the fields I mine on every channel I ingest, and what each one is good for. 1. The t.me/s/ page footer. Each preview page carries the channel's subscriber count at fetch time. Fetch daily, store the series. Growth spikes correlate with virality events; the decay slope after a spike tells you whether the audience was real. A 40k jump overni...