Everything that exists as it is now will remain open source. More than bought the developers seem to have been hired by eleven labs and most likely have been working there for a while, so they are actually taking their know how and experience there more than taking the code itself.
That’s how it looks like to me.
Another possibility is that the eleven labs reading app has portions licensed as agpl, the ones taken from omnivore.
They have their own reader app focused on their voice technology. Probably the plan is expand it to a read-it-later app similar to what omnivore is, and charge a subscription for ir. Similar to readwise but more focused on voice, I would think that’s the plan.
Remember that so far nobody is making money with “AI” other than NVIDIA so they are starting to do these far out or whacky pivots to seek monetization.