Sorry but that is just not true. I interviewed for one of those kinds of jobs. you have to have a pristine internet connection (if youre throttled/capped, FORGET it). The kind they have in South Korea. Most ISPs in the U.S. are capping or throttling (mandatory, no way out of it) their customers to price-gouge them.
Not sure which ISP’s you’re referring to, but the thousands of people my employer employs had no trouble getting the right speed connection.