I assume the parent post does - and so do I, in at least this particular case. Seeing how closly knit Facebook and Spotify are.
There's not just a shared investor group - there's also a partnership between the two companies. And it's pretty strong, as in; yes, it does seem like they have shared product control or at least great influences on each others product management
Mark Zuckerberg is listed and quoted as one of the references on their sign up page, by the way.
I would understand if the parent comment had noted everything in your second and third paragraphs about the strong partnership between product teams and Mark Zuckerberg's reference on the sign up page. That stuff seems incredibly relevant in this context.
If the intention was to paint the companies as working closely together, talk about how they actually work closely together, not about how the same VC firms at two different points in time happened to give them some money.
There's not just a shared investor group - there's also a partnership between the two companies. And it's pretty strong, as in; yes, it does seem like they have shared product control or at least great influences on each others product management
Mark Zuckerberg is listed and quoted as one of the references on their sign up page, by the way.