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Explain how a "3 visits free" model can be compatible with the identity principle. #437

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10 changes: 9 additions & 1 deletion index.html
Original file line number Diff line number Diff line change
Expand Up @@ -1221,6 +1221,14 @@
and adjust their [=partitions=] to prevent or support [=recognition=] across those intra-site [=contexts=]
according to their [=users=]' wishes.

<aside class="example" id="example-identity-paywall-conflict">
Some websites want to offer users a few free visits before asking them to pay for use of the site.
If the site tries to implement this by [=recognizing=] the user across visits, and a [=user agent=]
helps its [=user=] by preventing this [=recognition=], the site's business model can break.
However, a mechanism that only proves how many times the user has visited the site can be compatible
with this principle if it doesn't reveal that the same [=identity=] is visiting.
</aside>

## Data Minimization {#data-minimization}

<div class="practice" data-audiences="websites user-agents"><span class="practicelab">[=Sites=], [=user agents=], and other [=actors=]
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## Recognition {#recognition}

<dfn data-lt="recognize|recognized">Recognition</dfn> is the act of realising that a given [=identity=]
<dfn data-lt="recognize|recognized|recognizing">Recognition</dfn> is the act of realising that a given [=identity=]
corresponds to the same [=person=] as another [=identity=] which may have been
observed either in another [=context=], or in the same [=context=] but at a
different time. [=Recognition=] can be probabilistic, if someone realises there's
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