One thing I've learned is that sometimes free shit actually costs you, but the weird part is if you defbrief yourself when its likely you're being manipulated or there was an attempt, you can try to train yourself to cut them loose that instant and make you owe nothing(!) if its a non-correctable pattern and you can likely still sleep it off like a champ!

Obviously a nuclear option facially, but you can tone it down while still benefitting from the rheory of mind understanding of "their game

Edit: felt called to add that by psychologically turning the game around, you get to do 3 things:

1. Materially benefit
2. Demonstrate an anti-pattern to narcissists that non-verbally transmits that people or at least one person is on to their game and winning. Like bright colors helping insect avoid the dharma cycle ;)
3. You come out intact