That's a question for them.
FIDE online arena
I play in CCA tournaments and playing one this Saturday and Sunday.They are very strict on cheating and due to that I think they will not allow online titles
I recently signed up for the online arena and will tell you that the number of players online is near non-existent. Even during the day, you cannot find any FIDE rated games. I recommend sticking with Chess.com until the online arena's population increases dramatically.
It's really just a marketing thing for FIDE and a way to generate revenues.