The thing is, when you look at it from a big picture there are not strings attached. The site ultimately runs on advertisement revenue, and they do a great job of not being invasive with them.
Their terms of service must then include that the content contributed can be redistributed for such reasons, as their very platform depends on it.
The content you put up here can be seen by anyone looking for it, provided they have an internet connection.
This is a great opportunity for you to practice generosity without an expectation of outcome.
Perhaps you worry the site or community has some type of ulterior motive or agenda, but I really doubt that such is the case. Even if it was (It isn't) why should a gift include a caveat that the receiving ends cannot do what they want with it?
After all, edits are peer reviewed, a question and answer might slowly transform and become clear and concise, if the right person viewed the topics most suited for their experience.
No one owns the Dhamma, you cannot buy or sell it, and even if you could, where could you ever find a fair price?
I worry that you might have gotten the wrong first impressions about the community.
This might not be the sangha you are used to, as a forest monk the community you are a part of is vastly different.
I took my time writing this, it had my one pointed concentration.
I hope it finds you well, I hope you can take time to marvel that you are communicating with someone 8,649 mi away, (approximately) someone you might not share the same world view, but has interest in yours, and thinks that your perspective could add value to this stack exchange.