If what you're saying is indeed the case, that's some awful hypocrisy. WordPress.com (run by Mullenweg!) is not "real WordPress". It disables the installation of most plugins unless you pay them a boatload of money. Arguably, that's just as "hacked up" as what WP Engine is offering.
Imagine going after a direct competitor for doing to your open source project the exact sort of thing that you commercially do to that same project. The idea that they're immune to the morality argument because they contribute to the OSS project more is ridiculous.
Imagine going after a direct competitor for doing to your open source project the exact sort of thing that you commercially do to that same project. The idea that they're immune to the morality argument because they contribute to the OSS project more is ridiculous.