Astrologers should give away their services for free?

On my Seduction Central blog, I often answer reader questions, which amounts to a free mini-reading. After a reader fills out a form with their birth info and their love advice question, I send them a confirmation email, with the following text:

I have received your question for 'Seduction Central.'

The free answers I provide on this blog are a valuable service. Please support my efforts with a donation. (Please note that your donation does not guarantee an answer on the blog.)

This is then followed by PayPal instructions.

I just received an email response from one querent, who wrote,

Your response is not clear. You're asking for a donation without offering any commitment on responding to my question?

What about spreading good for the sake of good. I understand that is how true astrologers work anyway.

I cannot tell you how peeved I feel. In the early days of my blog I out-and-out asked for financial support in some of my posts, and learned that this was a potential turn-off to readers. I decided to just build traffic and hope that with enough visitors I could earn money with advertising. Although the blog is earning money, my revenue in no way compensates me for the hours of work I put into the blog.

I have developed boundaries with my blog so that I do not feel resentful for giving so much, because I derive pleasure from writing about astrology. I do not answer so many reader questions that I feel I am giving "too much."

Yet when I read, "What about spreading good for the sake of good. I understand that is how true astrologers work anyway," I feel undervalued and taken advantage of. What, are astrologers different from any other professional, such that they don't deserve to earn a living?!? I wrote back to this reader that doing "good works" and making money are not mutually exclusive endeavors. I put in many hours of study, not to mention the money I have invested in private tutoring and books and conferences, and I should just give all my wisdom away?

I think this reader subscribes to this toxic New Age belief that "spiritual workers" should not accept money for helping people. And I would not be surprised if many astrologers probably under-charge for this reason.

I don't know if it's tacky asking for a donation from someone who asked a question whose query I may never answer -- even though I make that explicit from the get-go. I figure that the few readers who do get their answer on my blog are getting free, valuable information -- and since these readers rarely offer a donation, other readers who value what I'm doing will offer some financial support so that I can continue to provide this service. I don't even give preferential treatment to readers who have offered a donation.

I'd love to hear your feedback: Do "true" astrologers only spread good for the sake of good?