Update README.md

README.md

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 |----------------|---------|-----------|
 | **Support**    | SDK 21+ | iOS 13.0+ |
 
+## 💖 Sponsors
+Do you need additional support? Technical support on Issues and Discussions is provided only to contributors and academic researchers of HaishinKit. By becoming a sponsor, we can provide the support you need.
+
+Sponsor: [$50 per month](https://github.com/sponsors/shogo4405): Technical support via GitHub Issues/Discussions with priority response.
+
+## 💬 Communication
+* GitHub Issues and Discussions are open spaces for communication among users and are available to everyone as long as [the code of conduct](https://github.com/shogo4405/HaishinKit.swift?tab=coc-ov-file) is followed.
+* Whether someone is a contributor to HaishinKit is mainly determined by their GitHub profile icon. If you are using the default icon, there is a chance your input might be overlooked, so please consider setting a custom one. It could be a picture of your pet, for example. Personally, I like cats.
+* If you want to support e-mail based communication without GitHub.
+  * Consulting fee is [$50](https://www.paypal.me/shogo4405/50USD)/1 incident. I'm able to response a few days.
+
 # 🌏 Dependencies
 
 Project name    |Notes       |License