In my opinion. I find it cleaner to keep it on another server instead of importing it into Logseq. The reason is that importing into Logseq would increase resources and further bloat the graph. I don’t think it is desirable to add more than my own writing to the graphs.
I intend to move to Infoflow as Omnivore.app has declared the end of its service. The app is still in its development phase: the web-based version was released a month ago and is still undergoing frequent updates. (At the moment, due to a bug, you cannot send URLs using the browser extension. You have to add a new one from within the app screen). Incidentally, unlike Omnivore.app, both free and paid plans exist.