I've noticed that dark reader on occasion phones home to darkreader.org, also with a increasing amount of sponsored links on their page. So what does everyone think, are they safe right now or should they not be trusted?
Normally it isn't a problem if an app phones home to its homepage, eg, looking for updates. I think that DarkReader is trustworth. But it's anyway good to use the less extensions possible, because they always add a privacy flaw to the browser as any third party app.
In Vivaldi instead of the Dark Reader i use the own Dark Mode in flags, it has also an ivert filter, among others, in the Page Actions menu.
Or if you know CSS, you can style the webpages to your like with Stylus (FOSS) (also permit to import pre made styles from other authors of the community)