Major tech firms including Amazon, Lyft, Meta, Twitter, Salesforce, and Stripe sponsored at least 45,000 H-1B workers over the past three years, Bloomberg found through analysis of data from the US Citizenship and Immigration Services.A H-1B is a temporary visa that allows companies to hire foreign professionals to "perform services in a specialty occupation," per USCIS.Tech firms rely heavily on the H-1B program to bring in engineering talent from around the world to maintain a competitive edge in a fast-moving industry.Many have been laid off and have to worry about children, mortgages, student loans, and other bills as well as the looming 60-day deadline for finding a new job in a highly competitive market.One former Twitter employee told CNN that many H-1B workers are staying on at the social media giant despite Musk's policies because they're "concerned with being forced into a flooded job market where they may be unable to find a job and before being forced out of the country.""