Lay off employees until they're profitable.

Tech companies tend to invest ahead of growth, because tech markets tend to be winner-take-all and if the market grows when you don't, somebody else will take the market. They're effectively using their employees as insurance to make sure nobody else can catch them in the market.

As a result, they often have orders of magnitude more employees than is necessary to keep the lights on, the product operational, and the money flowing in (at least in the short term). Google, for example, really just needs datacenter ops technicians and SREs to keep the product up, which is maybe 2% of their current headcount. If they laid everyone else off, they'd eventually become vulnerable to a competitor or lawsuit or public opinion or unhappy/indifferent customers. But until that happened, they could maintain quite hefty profits.