[alxlaz]

There are plenty of successful businesses that have adapted to, and thrived after, way more radical things than a social platform pulling out of one of its markets. There are plenty of small businesses that are doing fine, and have been doing fine, since before the Internet era, let alone Facebook.

Surely this wouldn't have a non-zero impact but nothing lasts forever -- especially not free services! Dealing with that is an integral part of doing business.

Besides, it's not like this will result in a complete communication blackout. If indeed the service Facebook is providing is valuable, there are plenty of other companies that will jump in. A little competition never hurt anyone ;).