Cancelling prime can affect returns by reducing the amount of interest earned. Prime is the fractional part of a number, so canceling prime is just reducing the number to its lowest terms. For example, if you have $5.75 and cancel prime, you would be left with $5.00.
The answer to this question is a little unclear. It’s unclear if ending Prime membership immediately ends the account or if it will last for the remainder of the current billing cycle. If it does end immediately, then you’ll have to wait until your next billing cycle to cancel.
No, only the people that you have given a specific link to.