Well, yes and no. Yes because in America there are very few other Orthodox, so we practically have to date outside The Faith. I think I know of one couple where after marriage he remained Roman Catholic and she remained Orthodox. Other than that the spouse has always converted or eventually asked for a divorce (not just because of The Church, obviously). The “flirt and convert!” strategy is alive and well in Orthodoxy.
The end result is almost everyone in my parish, if married, is married to another Orthodox, and the same for the other parish in town.
Those who aren’t married to an Orthodox are, however, married to a Christian. There is no amount of ekonomia that can extend to allowing an Orthodox Christian to marry a non-Christian. It’s not done. No dispensation or anything. Can’t take place in The Church and if you leave to get married elsewhere you’ve done just that - left.