Honestly, the channel matters more than the creative here. On Telegram the channel is your targeting, so a decent ad in the right place beats a brilliant one in the wrong crowd. The trick is to stop staring at the subscriber count and look at ratio instead. A channel with 100k subs pulling 500 views on recent posts is inflated, while a healthy one has a real chunk of its audience actually seeing what's posted, with reactions and comments that read like people rather than bots.
Beyond that, I want steady organic growth rather than sudden spikes, since jumps usually mean bought subs. Forwards, on-topic comments, and consistent views proportional to size are the good signs, while wildly swinging counts and suspiciously cheap CPM offers aren't. Geo, language, and niche fit matter more than raw reach, and tools like TGStat or Telemetr help you check view history and rough fake-follower estimates.
Even a clean-looking channel can hide a partly bought audience, so put a small spend through first and measure your own clicks, joins, and conversions before you scale.
Best,
Floqal