Clarify noncommercial license and USD 1000 per-model commercial option

COMMERCIAL-LICENSE.md

@@ -0,0 +1,26 @@
+# Commercial license — heack/HeackMT5-ZhCleanText1ML
+
+Publisher: the owner of the Hugging Face account `heack` (PenEcho).
+Model: `heack/HeackMT5-ZhCleanText1ML`. Offer effective: 2026-10-21.
+
+## Separate license for commercial use
+
+The public license is CC BY-NC-SA 4.0, limited to noncommercial use. Commercial use of the publisher's model contribution requires a separate commercial license. Commercial use includes use primarily intended for commercial advantage or monetary compensation, including business operations, commercial products, paid APIs, and customer services. Using a model without charging an end user does not by itself make the use noncommercial.
+
+A one-time **US$1,000 payment for this model** grants the identified individual or legal entity a perpetual, worldwide, non-exclusive license to use, reproduce, and modify this released model for its own commercial operations, products, and hosted services. The licensed model is the repository revision identified at payment; the license also covers the licensee's adaptations of that revision, including fine-tuning and quantization. No recurring model-license fee applies to that revision. Other models and future releases are not automatically included.
+
+This commercial grant permits the licensee's commercial use without a requirement to publish its own source code or model modifications. It does not grant a right to resell or sublicense the publisher's model weights to third parties. Distribution under the separate public CC BY-NC-SA license remains available under its terms. No rights beyond those controlled by the publisher are granted, and third-party licenses and notices continue to apply.
+
+## Obtain the license
+
+Use [PenEcho on Buy Me a Coffee](https://buymeacoffee.com/penecho). Select USD and make a one-time payment of **US$1,000**. Include `heack/HeackMT5-ZhCleanText1ML`, your Hugging Face username, and the name of the individual or legal entity receiving the license in the payment message. Identify the repository revision, or the current main revision on the payment date will be the licensed revision. Keep the payment receipt and a copy of these terms as your license record. For a company, the named company is the licensee; a single payment does not license unrelated companies or all models on this account.
+
+The commercial grant takes effect upon receipt of the full payment with the identifying information above. This is a payment for commercial permission; an optional donation below this amount does not grant commercial rights. The license covers self-hosted use and does not promise a publisher-hosted API, hosting, future updates, training data, support, or service-level guarantees.
+
+## Existing rights and third-party materials
+
+Existing valid licenses are not revoked by this offer. Upstream model and software components retain their original licenses. This offer applies only to rights the publisher is entitled to license and does not restrict rights independently granted by upstream authors. Retain applicable attribution and license notices.
+
+## Warranty and term
+
+The model is provided as-is, without warranties to the extent permitted by applicable law. The commercial grant is perpetual for the licensed revision, subject to compliance with these terms. It does not expire merely because support or development ends. Mandatory rights under applicable law are unaffected.

LICENSE

@@ -0,0 +1,438 @@
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+

README.md

@@ -1,9 +1,22 @@
 ---
+license: cc-by-nc-sa-4.0
 pipeline_tag: text2text-generation
 ---
 
 # HeackMT5-ZhCleanText1ML: A Text Cleaning Model for Chinese Texts
 
+## License and commercial use
+
+**Noncommercial use:** available under [CC BY-NC-SA 4.0](LICENSE), subject to attribution and share-alike requirements. **Commercial use requires a separate license.**
+
+**Permanent commercial license: US$1,000 per model**, as a one-time payment for this model's released revision. Models are licensed separately; this payment does not cover other models on the account.
+
+[Get a commercial license via Buy Me a Coffee](https://buymeacoffee.com/penecho) · [Read commercial terms](COMMERCIAL-LICENSE.md)
+
+Select USD and include **`heack/HeackMT5-ZhCleanText1ML`**, your Hugging Face username, and the licensee's name in the payment message. This grants self-hosted commercial use, not a hosted API subscription. Prior valid licenses and upstream third-party rights remain unaffected.
+
+
+
 This model, `heack/HeackMT5-ZhCleanText1ML`, is a fine-tuned mT5 model for Chinese text cleaning tasks. It is designed to remove gibberish, clean up the text, retain original information as much as possible, and does not process large sections of non-Chinese text (such as English text).
 
 此模块，主要解决困扰中国互联网多年的乱码问题，同时借助Transformer大模型，可以对文字进行提炼（很少的情况下以及
@@ -111,8 +124,7 @@ print(filtered_text)
 ## Credits
 This model is trained and maintained by KongYang from Shanghai Jiao Tong University. For any questions, please reach out to me at my WeChat ID: kongyang.
 
-## License
-This model is released under the CC BY-NC-SA 4.0 license.
+
 
 ## Citation
 
@@ -128,4 +140,4 @@ If you use this model in your research, please cite:
     author={Kong Yang},
     year={2023}
 }
-
+```