It is weird - the press release itself notes that this is the first such acquisition Mozilla has ever made.
In their defense, it won't be the first time they've gotten into operating a service -- there's Sync, for instance. So if they see expanding FF's bookmarking abilities as a key strategic differentiator, buying an existing read-it-later service they're already familiar with could be a simpler/cheaper way of getting there than building one from scratch.
Too bad sync kind of sucks... Just yesterday I was looking at a recipe on my desktop and then I opened Firefox on my phone and tried to get at the link without emailing or messaging myself and it only showed sync'd tabs from over a week ago.
There is an option in `about:config` for that -- `services.sync.sendTabToDevice.enabled`, disabled by default. Suggest you to enable it and try it out.
In their defense, it won't be the first time they've gotten into operating a service -- there's Sync, for instance. So if they see expanding FF's bookmarking abilities as a key strategic differentiator, buying an existing read-it-later service they're already familiar with could be a simpler/cheaper way of getting there than building one from scratch.