Yes, purchases did not increase anything...just the red box suddenly increased the seeds per click to 10...other puchases did not change anythign as far as i can tell
One thing I feel is not clear is what each item does. The yellow cars increase your seeds per second, the bags increase the seeds per click, the red can increases the speed of the auto clickers, and the watering can will give you seeds every 1-10 seconds. I will try to make what each item does clearer in the future.