EDIT: From the article:
Stock-underwriting activity was in the doldrums in 2016— money raised by U.S. IPOs was the lowest since 2003, according to Dealogic—and banks were hungry for fees.
And goes on to describe how they set aside all of the signs that underwriting the offering was a bad deal. (Well good for them, they would make money regardless but the retail investors would not get a clear picture of the challenges in SNAP's business model until it was too late.
This was exactly the sort of activity that defrauded retail investors in the dot com bust. "What do you mean they don't have a business model? Look here, Morgan Stanley is underwriting their offering, don't you trust these guys to know what they are doing?"