The slowest and most durable option: traffic from commenting goes to a subscription rather than a dialogue, and the channel earns from advertising and from selling to its own readers.
Costing a subscriber
Spend for the period divided by subscribers gained. Compare it not with a feeling but with the price of buying a post in someone else's channel in your niche — that is the alternative way to get the same thing.
Commenting usually delivers a cheaper subscriber, more slowly and in smaller batches. Buying placements delivers volume at once and costs more. They have different jobs: one grows the base continuously in the background, the other produces a spike for a launch.
Subscriber versus lead
A lead pays once. A subscriber can pay repeatedly over an undefined number of years. That is why a channel counts as an asset: it has a resale value, and a list of processed leads does not.
The flip side is that months pass between the spend and the income. The model does not suit anyone who needs turnover now.
How a channel earns
- Sponsored posts. Priced by reach and vertical; in expensive niches the same subscriber count is worth several times more.
- Your own products. Highest margin, because there is no intermediary.
- Recommendations. Work when the audience trusts the author.
When to choose this
When you have something to say regularly. A channel without content will not hold the people you paid to attract. Scheduled posting removes the mechanical part of filling it, but not the need to have a position of your own.