I've been resisting the Facebook (including WhatsApp) monopoly but at personal cost so I'm starting to capitulate. The network effect has been discussed at leng

I've been resisting the Facebook (including WhatsApp) monopoly but at personal cost so I'm starting to capitulate. The network effect has been discussed at length already, but imagine if the phone system was controlled by a single company and you could only call customers of the same company! For those living in the EU and UK (where GDPR still applies), has anyone had success with an Article 21 "right to object" request? For example, objecting to the sharing of data with Facebook when using WhatsApp. It is not an absolute right, it's supposed to be depending on individual circumstances so I expect there's lots of wiggle room for their DPO/legal team to refuse, or just stonewall. I'd love to be wrong, so please share...