Everything here scales with the list. Ten thousand engaged addresses can fund an agency and five hundred cannot, so pages that talk in list sizes let a business work out on its own whether this is affordable yet.
Delivery problems are urgent and specific. A business whose emails have started landing in spam is losing revenue every day, and content explaining why it happens brings enquiries that convert within hours.
Ecommerce teams search by flow. Abandoned basket, browse abandonment, post-purchase and win-back come from people who understand the mechanics and want somebody to build them properly.
Migrations are their own market. Moving years of history, segments and automations between platforms is a project people search for deliberately, and it is priced accordingly.