The goal of a burner LL is to trigger additional tier 1 LLs on the same day. Once you scan through your first LL that satisfies the initial requirement, the tiers are then removed. You want to pick a tier 2 ride that has no wait time first thing in the morning so you can get thru as fast as possible.
Keep in mind that doesn't guarantee anything if LL is sold out for a ride by the time you scan your initial ride it's still going to be sold out. All it's going to do is open up the ability to book additional tier 1 rides