> Besides, it's not like you can boycott Mastercard or VISA.

Why not? Lots of people, especially in lower income brackets, don't have ANY credit cards at all. I know many. They buy groceries and gas with cash and pay their utilities by ACH or mailing a check. Everything else they need, they buy locally.

What you mean to say is that it's _inconvenient_ for you personally to boycott Visa/Mastercard. Which may be true enough.

Visa and Mastercard run debit networks for majority of banks and credit unions. They get fees there as well.

Even lower income citizens use debit cards more than cash nowadays.

You would need to use different networks like Discover and American Express to effectively boycott them

I use cash for 90% of my expenses, and I bank with a local credit unions, but this and every other bank and credit union around use visa or mastercard for debit card services and I have to use the card for most online purchases.

That depends entirely on who you are paying. Many places reject checks, fail to setup ACH, etc. Those aren't direct competitors anyway: that would be American Express, which is often rejected since their business model is centered on customer bonuses funded through high transaction fees.

Well, we are discussing an online storefront/distribution service for a digital good (with obvious relevance to people here). Are you suggesting that it's merely inconvenient for Valve and its customers to not transact in cash?