You can't really fault the guys in the thread. Some of them are just eager to want to pick a fight with me, but the OP did not make it clear what kind of massage or where she works. I am going to guess this is a female attendant who started this, right?
If she is working at a body rub, or rub and tug then can we agree that handjob is expected?
As for tipping, which is totally different from "extras" that is a discretionary action on the customer's part. Do you tip at fast food restaurants when you are picking up, the same as when you are dining in? If there was no additional service, such as bringing the food to the table, etc.. then why should a customer pay for the person to take their order while standing up?
I can tell you for a fact that I don't frequent those places as you put it "semi legit" but if I do I will be frequenting Shangri-Lah. Do they have a bike rack?