Bidding for extra space

I’ve not done it but I presume it’s auction style (highest bidder gets the space) and depends on your sales price - pretty much like ads

I’d go off your previous monthly storage fees and work it from there

So go in at a price you are comfortable with in the hope that you’ll sell enough to cover the costs with the credits

From help

Important: Make sure that you specify a reservation fee that reflects your confidence in your ability to use the additional capacity and to offset the reservation fee with performance credits. If you’re unable to use the capacity efficiently and offset the fee, you will be responsible for paying the remaining balance of the reservation fee minus your performance credits.

Note: Your fee may be lower than what you specify in your request. For all sellers whose requests are granted in the same week, the lowest granted reservation fee will apply, regardless of the reservation fee that you originally submitted