Does anyone know about the issue of YouTube comments?

If I comment on a competitor's review video and promote my product, will my YouTube account be banned?

What is the approximate number and frequency of comments that can be made? Does anyone know

In most cases, no — your account won’t be banned immediately for commenting on a competitor’s review video and promoting your own product. However, YouTube has clear guidelines, and violating them repeatedly or egregiously can lead to warnings, shadowbans, or account suspension.

EcomPioneer said:

If I comment on a competitor's review video and promote my product, will my YouTube account be banned?

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Commenting on a competitor’s review video with a promotional message is considered spammy behavior by YouTube’s guidelines — especially if it's repetitive or adds no real value. While a single comment likely won’t get your account banned, it may be flagged, hidden, or result in a warning if reported or detected as spam