Fortunately (for me) the US has no such rules, other than the age restriction. I joined this game four years ago when I was 21. Now that my credit file is bui

Fortunately (for me) the US has no such rules, other than the age restriction. I joined this game four years ago when I was 21. Now that my credit file is built up, I can open five cards within a week or so and almost always get approved. Within three years of starting I had available credit of 150% of my income.