I don’t think it will affect the Facebook ecosystem that much in the beginning the newsfeed is ultra competitive and other companies will see it as a chance to gain some ground on the platform as others leave
I do however think that this will make some PR waves and see some companies follow, but not nearly enough
With the $10 Billion devaluation this past week as Facebook shares for the Social Media network lost 14% of its value because of the Cambridge Analytica data breach, you have to wonder if the Facebook platform is worth the gamble at the expense of customer privacy, loss of buyer trust and online reputation if any of their Fans' personal data is used responsibly.
Considering that both Tesla and SpaceX has never spent for any ad spend on the Facebook platform and build up their 5 Million Fanbase ORGANICALLY, as Musk can attest here:
Unfortunately Facebook is NOT a 'Social Media' company but an ADVERTISING company with OUR personal data (along with family, friends, coworkers, acquaintances, etc.) as its property to be bought and sold to ANY paying advertiser (no matter what doctrine or motivation) and accept ANY currency, including the Russian Ruble.e.