It is a big business in India and Europe and Wall Street. I don't think they light a candle in India without checking with an astrologer. In the Vedas it says "that which is closest to the truth lasts longest," which certainly would include astrology, developed around 7,000 years ago.
Yes, religion is big business everywhere.
As religion. And the mechanisms by which astrology is monetized are the same as the mechanisms by which religion is monetized.
This is substantially different from scientifically founded industrial processes, which are monetized by producing measurable goods and services in a predictable, repeatable way. I'm sure there are indeed superstitious investors on Wall Street who consult the stars when making investment decisions. And I'm sure that if you examined their investing strategies, it would be impossible to separate the effect of astrology from the other effects, and identify a predictable, repeatable, contribution from that source.
The reason I'm sure of that second thing is because if astrology were a predictable, repeatable way to play the stock market, it would form the industrial basis for every successful firm on Wall Street.
That's the economic rebuttal. There's no doubt that astrology works as a religion: It profits by telling people stories they want to hear. It profits by exploiting the various failure modes of human cognition, most prominently confirmation bias.
What I'm saying is,
astrology only works as a religion. It obviously doesn't work as a scientific principle. If it did, it wouldn't be found alongside the other religions and superstitions of the world. If astrology actually worked, it'd be found alongside the other industrial processes of the world. The manufacture of aluminum from bauxite ore, for example. The prevention of disease by vaccines. The transmission of signals by radio waves. The powering of automobiles by internal combustion or electrical batteries.
If astrology works, beyond making people feel good the same way any other fairy tale works, then it would have been put to work a long time ago.
Show me one demonstration of astrology, that is predictable and repeatable in its results, the way science is predictable and repeatable. Not an anecdote. Not a vague allusion to how popular it is in India. An actual scientific demonstration.
Even if astrology really is more than just a fairy tale, it can't be much more than a fairy tale. It can hardly be anything more than a fairy tale, otherwise we would have noticed by now and put it to work at scale.
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For me, it's like ghosts. Even if ghosts are real, it's obvious they don't really do anything.