I suppose it depends on how much everyone else is bidding. I missed out because my bid was less than 1% of total bids. I've started using steemdb (https://steemdb.com/@discordia/votes?type=outgoing) to track when the last round of upvotes have been, and work out if my 0.05 is worth bidding just before the round closes.... that is if I have 0.05SBD to burn...