Where does The 30 Days Substack Challenge advertise?

The 30 Days Substack Challenge is currently advertising in 1 newsletter (placed within the last 60 days).

Placements

first time in this newsletter

• HOW WE GROW with Ana Calin primary · Sep 5
• first time in this newsletter HOW WE GROW with Ana Calin primary · Aug 26

Issues read through Sep 19.

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