I have no disagreement that the experience is more important than the money, but in the US, if you are doing useful work for a company, then they legally have to pay you.
Being offered an unpaid internship should be a red flag. While it's possible for a tech company to have an intern around who does no useful work for the company, I find it unlikely. And, given that, any company that would willfully break labor law is probably going to be a bad place to work.
Being offered an unpaid internship should be a red flag. While it's possible for a tech company to have an intern around who does no useful work for the company, I find it unlikely. And, given that, any company that would willfully break labor law is probably going to be a bad place to work.