i hate to be the bearer of bad news but thats not really against the 1st. the 1st restricts government action, not private business decisions, so visa and mastercard pressuring steam and itch isnt a violation
a credit card company refusing to process payments for products is not a violation of your 1st. its understandably upsetting as it shows how much power companies have simply through using finances as leverage, but its not an amendment violation
of course if you think this is unamerican in some way, you've got the luxury of being able to write to your representatives