Are 4 interns really more useful than 3 seniors? Really?
Are 4 interns really more useful than 3 seniors? Really?
Those interns will turn into salaried FTEs whose first three year's annual compensation – amortised signing bonus, stock grants, and performance bonus included – will be ~150k. Compared to new graduate FTEs, interns are positively cheap!
The ~6.5k, housing inclusive, perks out the wazoo also all come from highly profitable, competitive companies falling over each other to recruit from a highly constrained pool. There are only so many Stanford, MIT, and CMU graduates a year, and an even smaller number of hackathon winners, open source contributors, inveterate interns, etc. For many, this is the last time they'll ever openly be on the job market.
You're paying for more than the intern's time - you also get first crack at hiring them full time (with a 3 month interview to decide who you want). In the current job market, that's worth quite a bit.