> Also, isn't this breaking the constitution?

I don't think that's been of much concern as of late.

> Also, isn't this breaking the constitution? It bypasses needing a warrant respectively having a objective suspicion.

Nope.

Your personal information, when given to others, is now trash on the curb (in a literal sense, see: https://en.wikipedia.org/wiki/California_v._Greenwood )

Buying it just clears up the chain of custody as opposed to the NSA stealing it and reverse engineering your warrant -- OR -- using the good ole stingray.