Though tip 3 assumes each person ordering the gig or gig package wants roughly the same amount of work. But the amount of work required might vary a lot depending on the project, like in the amount of manual work (eg. maybe 5 mouse clicks vs thousands) or amount time required in render time/upload time etc.
So for projects that are on the low end of the amount of work required (eg. they want something simple to do) in that package it might be worth offering a lower quote, because Fiverr doesn’t give that much scope for building in the exact amount of work required for the project into each gig/package.