Misleading “free / unlimited” impression vs real AI fair-use limits

I installed Immersive Translate after seeing the “free to use” and “unlimited usage” messaging on the product page, and was required to log in before accessing core AI translation features.

However, after logging in and using the AI translation feature (specifically YouTube subtitle translation), I encountered a fair-use limitation after a very short period of normal usage.

While the pricing page does mention “fair-use principles” and “usage limits”, the actual limitation behavior is not clearly defined in advance, and no concrete quota or usage threshold is provided to users before they start using the service.

From a user experience perspective, this creates a significant expectation gap:

The product emphasizes free and unlimited usage in its marketing presentation
Users must log in before using core functionality
Real usage is subject to undisclosed or dynamically enforced limits
Limit is only revealed after active usage, not beforehand

In practice, this makes it difficult to understand what “unlimited” refers to in real-world usage, especially for AI-heavy features like video subtitle translation.

It would greatly improve transparency if the product:

Clearly defines AI usage limits before login or onboarding
Provides visible quota or usage indicators
Avoids “unlimited” wording for features that are rate-limited by AI cost
Separates “feature availability” from “AI usage capacity” more explicitly

The core functionality of the extension is strong, but the current communication of usage constraints feels inconsistent with user expectations created during onboarding.