[cortesoft]

It sounds like that might have been the place that stole it?

[duskwuff]

Doesn't matter. A WordPress plugin/theme developer has no business altering the content of sites using their software.

[cortesoft]

I don't know anything about WordPress, but isn't a plugin supposed to alter the content of the site using their software? If it didn't, why use it?

[basilgohar]

Not changing content linking to a competitor's services into one linking to author of the plugin's without the user's knowledge.

[duskwuff]

Generally speaking, most WordPress plugins alter the presentation or functionality of a site, not its content. There's some exceptions, like search-and-replace [1], but even in those cases the functionality is made obvious to the user.

[1]: https://wordpress.org/plugins/search-and-replace/