Paying a Distributor to Carry Nothing Else

The Contracts in Question

Two related arrangements sit at the centre of a long running argument in competition law.

Exclusive dealing is a straightforward commitment: a distributor or customer agrees to purchase a category only from one supplier, usually in exchange for better pricing, marketing support, or guaranteed supply.

Loyalty rebates, sometimes called market share discounts, achieve a similar result without formal exclusivity. The buyer receives a rebate conditioned on purchasing a high share of its requirements from the supplier, commonly eighty or ninety percent. The buyer is technically free to buy elsewhere, and doing so costs it the rebate on everything.

Why the Second One Is More Powerful

The economics of a share based rebate are frequently misunderstood, and the key insight is about how the discount is distributed across units.

Suppose a customer buys one hundred units and receives a ten percent rebate on all of them for buying at least ninety from one supplier. A rival wanting to sell ten units is not competing for ten units at the market price. It is competing against the loss of the rebate on all one hundred, which the customer would forfeit by dropping below the threshold.

The effective price the rival must beat on those ten units is therefore far below cost, sometimes negative. This is the contestable share analysis: only the portion of demand genuinely open to competition can carry the full weight of the discount forfeited across the whole volume.

The Efficiency Case Is Genuine

These arrangements would not be so difficult if they were simply anticompetitive, and they are not.

Exclusivity solves a free riding problem in distribution. A supplier that funds training, demonstration equipment, and showroom space wants those investments used to sell its product, not to educate a customer who then buys a cheaper competitor. Without exclusivity, the supplier underinvests.

It also supports relationship specific investment. A supplier asked to build dedicated capacity or customise a product for one buyer wants assurance of offtake, and exclusivity provides it, which is the same logic as a take or pay contract.

And a committed volume genuinely lowers cost through production planning, longer runs, and reduced inventory, which the supplier can share through price.

The Foreclosure Case Is Also Genuine

The harm arises when a dominant supplier locks up enough of the distribution channel that a rival cannot reach minimum efficient scale.

The point is not that any single customer was coerced. Each customer may have accepted the deal willingly and benefited from it. The harm is cumulative: if the dominant firm ties up seventy percent of available distribution, an entrant competing for the remaining thirty cannot achieve the volume needed to compete on cost, so it never becomes a real threat, and prices across the whole market stay higher than they would have been.

This is why competition analysis focuses on the share of the market foreclosed, the duration and terminability of the contracts, and whether the arrangements are used by a firm with market power. Identical contracts signed by a firm with a small share are generally unobjectionable, because they foreclose nothing.

How the Law Landed

The analytical approaches differ meaningfully across jurisdictions, and the direction of travel has been toward economic effects rather than form.

American law treats exclusive dealing under a rule of reason, examining the share foreclosed, contract duration, ease of termination, and the presence of business justifications. Short, terminable agreements foreclosing a modest share are rarely condemned.

European law historically treated loyalty rebates by a dominant firm as close to presumptively abusive. That position was significantly revised by a 2017 judgment in which the Court of Justice held that where a dominant firm advances evidence that its conduct could not foreclose an equally efficient competitor, the authority must engage with that analysis rather than rely on the form of the rebate. The practical effect was to import a version of the as efficient competitor test, which asks whether a rival with the same costs could profitably match the effective price on the contestable volume.

What It Means Commercially

For a firm with meaningful market share, the design details are the compliance question. Shorter terms, easy termination, discounts tied to absolute volume rather than share of requirements, incremental rather than retroactive rebate structures, and documented cost justifications all reduce exposure substantially.

Retroactivity is the single most important variable. A rebate applying to all units once a threshold is crossed creates the cliff that makes the last unit unmatchable. The same discount applied only to units above the threshold does not.

The Bottom Line

Exclusive dealing and loyalty rebates are ordinary commercial tools that become exclusionary in the hands of a firm large enough that the channel it ties up is the channel a rival needed. The analysis that actually matters is not whether customers were harmed at signing, since they usually were not, but whether enough of the market was locked away that a competitor could never reach scale. The retroactive share based rebate is the structure worth understanding, because it can price a competitor out of a sale it should have been able to win on cost.