It does and doesn't on the basis of what you want to advertise and how much you want to spend, if you want to advertise something not too important with a small amount, then posting your ad on TG channels with good numbers of subscribers may be fine; but if your ads are significant, you have to top your budget and seek better platforms for your ad.
That's it, maybe fine, there's nothing wrong if you will try to publish your ads in telegram but don't expect it will have a good result.
There are a lot of criticisms with this social media that used most commonly by the crypto bounty programs, most of them says that a full of scammers.
Another is the Telegram channel, I don't know if the subscribers are true users or even if the follower is real, maybe they will mute the notification if this isn't important to them.
Just try it if you have enough budget but don't rely on Telegram, try other platforms to have ads on your own platform for better traffic results.