I am sure those companies won't pop on your radar but they will for Indians and other foreigners that want to earn average US salary in their own countries. And yes, you should completely avoid them, they have typically terrible reviews and treat devs as machines.
I know one UK dev who took a job in one of those, moved there from some hotel booking company, earned $200k, lasted almost 2 years and then got unceremoniously sacked right when one of his close family members passed away due to missing required metrics.