Change for a smile?

I was always told to greet everyone with a smile.
It does not cost you a thing they say.
I tend to disagree with this statement.

A smile leads to an introduction,
This leads to a conversation,
Tends to birth a friendship,
And now you are invested in a relationship.

Everything new and exciting,
Fast paced and close to heart,
Rewards and benefits,
Never a dull moment,
Soul-mates,
An indestructible pair

However, nothing for free in today’s day and age,
A bill for the shoulder to cry on,
Debt orders for the acts of loyalty,
Receipts to prove what has been done for you,
Bank guaranteed cheques accepted here,
Best you pay up on time my friend.

Wake up and your life account shows a very depressing zero,
But this is no reason to despair
You are now the proud owner of real world experience,
Invested into yourself,
The first crop may be lost, but there are still smiles left to come

So I sit across from you,
With a smile on my face,
‘That will be one lessoned learnt please’ I say
‘There you go kind sir’ you reply
‘Thank you’ I reply
Now please take your change.