If you are innovative, you can make selling WordPress services a success. Two examples:
1. GoDaddy acquires Serbia’s ManageWP, a multi-site WordPress management tool (https://venturebeat.com/2016/09/06/godaddy-acquires-serbias-managewp-a-multi-site-wordpress-management-tool/)
2. GoDaddy buys WordPress services startup WP Curve (https://techcrunch.com/2016/12/05/godaddy-wp-curve/)
Godaddy bought these companies because they were innovative and good at what they were doing. Innovation is about having competitive advantage, that’s the core startup concept, not just call yourself a startup.