astrology has a much lower entry cost. There's always a girl in the back of class willing to tell you your sign for free. you can get a cool bracelet for like 3 bucks or a necklace for 5. there's astrology books for like 10 dollars with a decent amount of information in them. The stars are always overhead(although they've gotten harder to see). Plus every single newspaper has horoscopes and there's a million apps. You can pay to get a more complex reading for like 20 bucks. Dowsing require you to go to the middle of nowhere and spin a stick around, geomancy only makes sense if you are a builder really, and any sort of animal-based augury is considered cruel and wasteful in addition to being expensive and well outside most people's skill sets.

On another note, all those other things have been commodified. You buy animals as pets or as food, they aren't divine. the earth is to be bought and sold, it isn't divine. if there is gold it is already owned so what's the point? The stars, at least so far, cannot actually be sold to you. So they still carry their heavenly status, just as they have since time immemorial. Sure you can sell things based upon that divinity, but the stars themselves will still be in God's domain above us mortals.