Is Red Hat a conflict of interest? MongoDB (pre-2018)? Docker? Nginx? These for-profit companies all sell proprietary software alongside their open-source offerings with the same name.
Is it a conflict of interest that Plausible Analytics profits off a hosted version of their open-source software? How about GitLab? How about Bitwarden?
If you take issue with companies selling products based on open-source software they created (and using the same name), there are a LOT more companies you should take issue with than just Automattic (who, as discussed, voluntarily spun off their trademarks into a non-profit, unlike the companies named above).