Why did you expect anything else from either company? By profile they really mean data. Every company out there offering free services is after your data and it definitely belongs to them since they have the context for it. Your name and number and interests by themselves don't mean anything but put a context around it and that is what belongs to them.
My point was that Facebook don't also provide email services. Perhaps lock-in is too strong a term, but it's certainly convenient enough to discourage using anything other than gmail - and means that google will own a much larger chunk of your online identity than Facebook does now.
> My point was that Facebook don't also provide email services.
Incorrect, as of a few months ago. Every(?) Facebook user now has an email address: <userID>@facebook.com. You can send messages to external email addresses from the messages tab.
Actually, I do, but I do it by redirecting mail to my DNS to my gmail account. If I change provider, I don't need to tell everyone my new email address.
that seemed weird that they wouldn't just use that, but the facebook platform policies don't seem too keen on that kind of use (which makes more sense than your post, considering the legal claims facebook has made in the past against harvesters of their data, but I could still be wrong).
That one line was enough to convince me to delete my Facebook account again, once and for all. Thank you.