Agreed! We just posted a new version with a MUCH better share formula fix! Try it out and see if it works better for you! Shares are based on career earnings, so you'll have to make more after a reset, but in the new version you'll make a LOT more shares and each share makes a lot more money!
The cost of shares is based on career earnings, and, yes, the formula does grow over time in terms of share costing. But the new version 0.1.3 gets shares more quickly, and the shares work harder for you, so be sure to check it out!
Try clicking the EYE button to switch views if you are having trouble finding a button!