patreon: private messages to creators are not allowed for free members:
"article:115002832026-How-do-I-message-a-creator"
When can I message a creator?
You can privately message creators on Patreon if one of the two conditions is true:
You have one processed payment with the creator through Patreon
You currently have an active membership with the creator on Patreon
If you are not yet a paid member and want to reach out to a creator, you'll need to contact them outside of Patreon.