
optins) is deprecated in Mailchimp's API; it returns 0 for every account. Mailchimp's own dashboard no longer shows a matching "Opt-Ins" metric. To see how many people are on your list, use List Member Count.timestamp_opt, from the Members report) is a per-member date and time that records when an individual member opted in. It is a detail attached to each member, not a total or a metric, so it cannot be added up into an opt-in count.|
Field
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Report
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What it measures
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Best used for
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List Member Count (Stats Member Count)
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List Growth
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Total subscribed members per list at end of month
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Total subscribers per list
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Subscribes
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Landing Pages
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Sign-ups through a Mailchimp landing page only
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Landing page performance
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Conversion Rate
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Landing Pages
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Subscribes divided by Unique Visits
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Landing page performance
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Opt-Ins
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List Growth
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Deprecated by Mailchimp; returns 0
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Not usable; use List Member Count
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Opt-In Timestamp (timestamp_opt)
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Members
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When an individual member opted in (date/time)
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Per-member detail, not a count
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