Coinmerce looks at each hard fork separately. This is for the following reasons: The trading volume of new forks is often too low to offer them and a hard fork may pose unknown security risks.
Do you still want to receive the funds created as a result of a hard fork? Then send the appropriate cryptocurrency to an external wallet that supports it.
What is the Coinmerce Hard Fork policy?
In this article, you'll find Coinmerce's policy regarding hard forks.