Thank you for that detailed analysis. Perhaps I should have emphasised that the scenario I am suggesting is one where there are already multiple open social networks that are communicating with each other using "industry standard" W3C social network specifications.
If technology were in widespread use for allowing instant automated publishing of social media posts to friends on other networks, then I don't see how Facebook could legitimately claim that they can only implement a process that takes weeks (or deluges their competitors with unwanted information). A court should see this as malicious compliance and demand a more "reasonable" effort from them instead.
makes a strong case (in section 3.2) that the GDPR's data portability right should be considered in terms of EU competition law generally:
"In light of the above, it can be argued that a refusal of a dominant firm to enable data portability might be seen as a form of exclusionary abuse as it might drive its competitors out of a specific relevant market and increase market concentration."
If technology were in widespread use for allowing instant automated publishing of social media posts to friends on other networks, then I don't see how Facebook could legitimately claim that they can only implement a process that takes weeks (or deluges their competitors with unwanted information). A court should see this as malicious compliance and demand a more "reasonable" effort from them instead.
This article:
http://ejlt.org/article/view/546/726
makes a strong case (in section 3.2) that the GDPR's data portability right should be considered in terms of EU competition law generally:
"In light of the above, it can be argued that a refusal of a dominant firm to enable data portability might be seen as a form of exclusionary abuse as it might drive its competitors out of a specific relevant market and increase market concentration."