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C4. Voluntary Preference under Real Substitution (anti-lock-in)

Construct: when viable alternatives exist and practical switching freedom is present, the customer prefers the offer over the status quo and relevant alternatives.

Qualifier: distinguish preference from switching costs (procedural/time, financial, relational), which can sustain retention without preference.

Application​

When the customer has viable alternatives and can switch in practice, they choose you (not just “stay”). The key is separating preference from retention due to switching costs (procedural/time, financial, relational).

Examples​

Example 1 — B2B SaaS with short contract (substitution truly available) Unit (C1 summarized): mid-size e-commerce wants to reduce support cost/time → helpdesk+automation → vs Zendesk/Freshdesk + macros + BPO.

Agent/DMU: buyer/decider=Head of CX/Ops; user=support/CS Ops.

C4 works (voluntary preference):

  • Customer is month-to-month (or at end of contract), exports data easily, and has 2 tested viable alternatives (pilot running).
  • Even so, they choose to renew/expand with you (e.g., add seats/channels) because the offer is preferred in real confrontation (status quo + alternatives).

C4 does not work (lock-in retention):

  • Customer “renews” because they are stuck due to annual contract, historical migration, integrations, and training (procedural/time cost).
  • Here switching is not “free in practice”; lock-in can sustain retention without preference.

Example 2 — “High usage” but switching blocked by costs (the classic false positive) Unit: regulated company wants observability → platform X → vs approved incumbent + alternative Y.

Agent/DMU: buyer/decider=IT + Security + Procurement; user=SRE/Platform.

C4 works:

  • You measure preference at the moment switching is feasible: contract end, exportable data, alternative approved by security/procurement.
  • Customer chooses you even with incumbent discounting → signal of preference under real substitution.

C4 does not work:

  • Customer stays because they “cannot switch now”: vendor assessment, procurement, perceived risk, SSO/audit dependency, critical integrations.
  • That is switching cost (procedural/financial) and is not equivalent to preference.

Example 3 — Multi-homing/share-of-wallet as a clean test (when two can be used) Unit: restaurants choose delivery marketplace → platform A → vs platform B + direct order.

C4 works (strong test when multi-homing is possible):

  • Restaurants can operate A and B in parallel (switching/usage is not blocked).
  • Preference appears as voluntary allocation: more budget/more items/higher operational priority in A even with B available.
  • This scenario is useful because it reduces the “lock-in argument”: if multi-homing is viable, choice becomes more revealing.

C4 does not work:

  • Platform enforces exclusivity (contract, penalty, equipment, ranking), and restaurant “stays” due to fear of loss/penalty — again, switching cost, not preference.

Minimum checklist (to avoid confusing C4)​

  • Are there viable alternatives for that ICP (not “in the market in general”)?
  • Does the customer have practical freedom to switch now (contract, migration, integrations, approvals)?
  • If the answer is “no,” treat as lock-in (procedural/financial/relational) and do not count it as preference.