[S4M]

Also nitpicking, but in the mathematical sense, 1000B/year or 1k/year are also O(1B)/year.

[ksenzee]

Yes, which is precisely why it bothers me. All I see in my head is a flat line on a graph.

[ghayes]

yeah, O(1)

[StavrosK]

Are they really? AFAIK you need to have a variable in there, so all those simplify to O(1) (not 1B). Which is in line with your point, I guess.

[S4M]

Yeah, O(1) or O(1B) is the same. However, 1B is o(0.01 * (age of the company)), even though the sun will have exploded before a company who's revenue is 1 cents * its age reach 1B.