Community & forums
STM (Stack That Money)
Long-running paid affiliate forum, declining since 2020.
STM Forum (Stack That Money) was the dominant paid affiliate community from 2011 through ~2019. $99/month, heavy on Facebook and native traffic, occasional in-person mastermind events. Lost relevance after 2020 as the ecosystem shifted to AffLIFT, private Discords, and Skype groups. Still active but smaller. Useful archives if you can find leaked or member-shared threads.
Example
STM 2018 archive thread on Outbrain conversion-bid-strategy still gets cited in AffLIFT and Discord groups — most of the principles still hold.