Just adding my 2 cents
I am bidding for Amsterdam for July
I am only doing 4 or 5* for 2 zones Royal palace & Canal plantage but prices they recommend are over $200
I just bid every few days ( I still have time) last bid rejected was $190 as I get closer to the date I need I will increase the bid
I have booked a refundable hotel just incase
Try not to stress about bidding ..worst case you could do the Express hotel option or just keep the one you have booked