Thank you very much for your support! Let me clear out the confusion: The current EasySTAR Astrology pack at Humble Bundle is the last release I'm making under the name "EasySTAR", I've released these through several Humble Bundles in the past couple' years but since I built them to use the same shared set of graphics, they became rather unwieldy to update and make compatible.
I'm now going back at each of the EasySTAR packs, one by one, and making them standalone (so they're easier to update and use individually), while using up the opportunity to finetune all the animations. I'm also doing this with some other animation sets that I've never released; one such case is the Essentials animation pack which I made almost 2 years ago. So, yes, you will be able to buy the other 3 individually!