60% of the LD's I buy are for girls that I have no intention of taking.
They can be for good service, favours girls do me or girls I have known for years etc
A little gets you a lot of goodwill and good reputation leads to better service.
If it works for you ------------------ fine.
This is my problem with ladydrinks.
If I sit down at a bar with 15-20 girls working I want to take my time and "inspect the merchandise", if I buy a ladydrink for the first girl that approaches me then I will not be able to get rid of her.
If a girl spends quite a bit of time talking to me I would rather put 100 baht in her hand as I leave.