People create content for free. And the platforms take the benefit out of it by displaying ads and make more money than the creators. And this has been going on for years. Facebook is the one which is the most unfair of all social networks where they give peanuts to the people who create content. And this means that those networks who allow them to monetize the creators are going to be working in those places.
Telegram has decided to break this unfair chain approach in the world of social media. They are the know messaging network that has their own coin and the blockchain. So they are going to be allowing the users to monetize their channels and also get the funds into the user accounts through TON coin. They announced this on twitter recently.

These ads are shown in the channel as a small sponsored bubble like message which would be easy to skip too. So they are not like very harsh on the user content. So if you consider the right approach for displaying the ads, it'd be reasonable to say that for channel owners this would be a good option to monetize their content and the channels too.

Ad revenue sharing from the Telegram would be in the TON coin. So this way they are going to allow more users to be on their chain and the transfer of the assets would move through the chain. Which goes to show that it would be earning them something reasonable. You may require a bit of more subscribers and the people who are on your channel and also always clicking type of audience. So you have to experiment with your channel on this.
It's a good news for the creators who are using the telegram to bring traffic on their youtube channel or even on channels where they are making the content and producing the output there. It may not be much as of now but slowly this would add up as an income source. So make sure to keep a tab on the update and monetize when your time comes.