I'm covered in numbers but I do no maths.
I'm sharp and pointy but I do no harm.
I get paid to do what costs me nothing.
Some people like me but others may prefer my friends.
What am I?
I would define paying someone or something as giving it/them money.
The lines of the riddle may refer to different parts of me, but they all refer to the same me, no synonyms are used.
The title is also a clue.