If you get to be that large of a company (100 workers => 4% of staff => ~2500 employees) and you are not making a profit, there is something wrong. Bringing all of those people onboard seems like a waste of investor money.
That said, I am a fan of Blue Apron and I do hope that their figure out a way to operate in a profitable manner soon.
Edit: as replies point out, profitability isn’t a great indicator for the success of a company. While it is fair game to ask, there are other better indicators (churn and burn, existing customer base, etc) that give a better picture. My point was that I think a company at this size should be profitable or working aggressively to make that possible. I think Blue Apron is laying these people off to accomplish that.