Add few words towards support methods

docs/development/what.rst

@@ -3,12 +3,13 @@
 What can I contribute?
 ======================
 TESPy has been developed mainly by Francesco Witte at the University of Applied
-Sciences Flensburg - and a lot of free time. We hope that many people can make
-use of this project and that it will be a community driven project in the
-future, as users might demand special components or flexible implementations of
-characteristics, custom equations, basically what ever you can think of.
+Sciences Flensburg - and since 2021 with a lot of free time. The goal is, that
+many people can make use of this project and that it will be a community driven
+project in the future, as users might demand special components or flexible
+implementations of characteristics, custom equations, basically what ever you
+can think of.
 
-Therefore, we would like to invite you to contribute in this process, share your
+Therefore, I would like to invite you to contribute in this process, share your
 ideas and experience and maybe start developing the software. Your solutions
 may help other users as well. Contributing to the development of TESPy is easy
 and will help the development team and all other users of the software. If you
@@ -42,6 +43,13 @@ The components equations represent the behavior of each component. Do you miss
 equations? Open a discussion on the GitHub discussions page or add them to your
 fork of TESPy and create a pull request on the dev branch.
 
+Sponsor the development
+^^^^^^^^^^^^^^^^^^^^^^^
+As mentioned above, I maintain and develop this project in my free time. If you
+would like to support me by sponsoring a coffee for late night sessions or need
+direct support for your projects using TESPy, you sponsor me on GitHub
+https://github.com/fwitte or reach out to me via e-mail.
+
 Add component characteristics
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 Another highly appreciated way for you to contribute is the provision of new