They don't need a subpoena/warrant for data that the company chooses to sell the government. It's not your data, but data about you owned by the company. The government can ask a bank or netflix for all their customers data or even for an online portal that gives them unlimited access to whatever they need in exchange for cash and plenty of companies welcome the new revenue stream. (see for example https://www.nbcnews.com/tech/security/us-government-buys-dat...) This isn't limited to the government buying up data either. Things like access to real-time GPS location has been for sale from every major mobile carrier