Reading it again it was what I had in mind. Thanks for the PR!

Also I realized that we have the same problem with deleted users:

1. Sign in as "user@example.org"
2. Check that I have the notifications sending frequency set to "daily"
3. Delete my account
4. Open a rails console and run "Decidim::User.where.not(deleted_at: nil).first.notifications_sending_frequency". See that it's daily

@alecslupu can you open another PR to fix this related bug? As I think we should handle that in another PR, I'll merge this as is. Thanks

Originally posted by @andreslucena in #13689 (review)