We're building an ad marketplace for Telegram channels — looking for honest feedback

Hi! We're a small team building Trigram (https://trigram.site) — a marketplace where Telegram channel owners list their channel for free and get paid ad requests, and advertisers pick a channel and an exact hour. The USDT payment is held by the platform until the post goes live. A bot publishes the post and checks it stays up for the paid period. There's also mutual promotion between channels and a free Chrome extension with channel analytics.

We'd love an outside view:
- if you run a channel — what would stop you from listing it on a platform like this, what's missing;
- if you've bought Telegram ads — what annoyed you on other marketplaces;
- what's unclear on the site at first glance.

Any criticism is welcome, right here in the thread. If you have a channel and want to try it or talk about working together — message our support at @trigram_support_bot, we reply ourselves.