Some of those who made it to the continent were welcomed as a source of cheap labor, but some Americans considered them to be a cultural and economic threat (e.g. in the case of Chinese immigrants in the 19th century).
After settling down in the U.S., some of the immigrant men were longing for wives who shared the same language and customs, therefore so-called “picture-brides” from the old country were courted through the mail. The young women who accepted such marriage proposals first met their future husbands on Ellis Island. Occasionally, men and women changed their minds when they saw their intended spouses, but most of them eventually married, some right on Ellis Island.