Speaking for myself, my rates are laid out clearly on my website. Some generous people tip on top of my rates and some don’t. I never expect it, but appreciate and love it when it happens. Tip if you have a good time, if you feel like it. You won’t get in trouble if you don’t tip at all with indies.
Some massage parlors, the ladies might live off the tips and don’t make any or very little off the house fee. Different massage places have different rates and different menus. Make sure you know what kind of place you’re in before getting comfortable.