In the unironic way. I expected it to exist in some form, but being this formalized? wow.
Anyway it's apparently still a thing https://inspirationalwomenseries.com/mail-order-bride-sites/ 
And you used to be able to get them from Ukraine! https://www.imdb.com/title/tt3249478/
Not much, other than they both wanted to go back. They were from Novosibirsk.