They already collect as much information about you as possible. Whenever you turn on a Mac, you're essentially agreeing to a ton of data collection. It is naive to think that they will never share it with anyone.
> There are even more when it comes to actual search warrants.
Probably not much, since there is very little that would be within third-party custody that they would need a search warrant rather than one of various forms of subpoena (including administrative ones like NSLs) for, and the latter would already be counted in the “without a search warrant” count.