I'm proud to say shit loads over ten years, don't think anyone should be ashamed for buying content for a game they enjoyed.
I loved burnout paradise and put hundreds of hours into it, sure as hell I was going to be buying big surf island as soon as it landed.
Did I buy the ecto 1 car to race around in? No, I saw lots of people did and I'm sure they loved it. Personally I'm not one for cosmetic items and that's about where I draw the line, and of course in game currency in a game you have paid for, they can fuck off with that practise.