In a lot of those cases, the company has decided that the lower tiers do not exist, because they lose money, and part of the point of the sales process is to we

In a lot of those cases, the company has decided that the lower tiers do not exist, because they lose money, and part of the point of the sales process is to weed them out. (And even if they do have lower tiers, they don't want to hurt their actually profitable higher tiers by providing price anchoring.)