Yes, years ago I knew a guy with a mail-order bride, and it was sad as the five-year wedding anniversary approached; they both knew it would end at that point, and I believe he wanted to stay married while she wanted to move on as an “American”. No children, just five years of “indentured servitude” for her so she wouldn’t have to return to Ukraine...
I know someone married to a Ukraine woman, and has been for decades...so some marriages are out of love, and last. Others are for citizenship.
I think it best to let God find a person a spouse...everything we think we know about life isn’t enough for such a big investment of life. People deceive either intentionally or with promises that are never kept, infidelity, among other things. Also, we can be our own worst enemies when it comes to life decisions.
I’m not criticizing any relationships made by those from other countries, our military has found some great marriages by marrying abroad over the years. The mail order bride thing is a bit unstable in my overview.