Doesn't the post read that it's the server who would give you the kiss, if you compliment them three times?

Also, volunteer is not the same as employee. Especially important in this context.

I read it as if you pay 2 compliments and then proceed to kiss / spank the employee you would also get a compliment in addition to whatever you ordered. And that compliment would give you an extra pep in your step.

> order hugs ranging from warm + fuzzy to long + uncomfortable, each for 2 compliments to your server

Any one of these is either: 2 compliments from customer. So, it would be assumed that compliments are going from the customer, to the server, for the extras as well. Instead of the whole dynamic switching around halfway through.

> Add a kiss or a spanking for an additional compliment

Customer can add a kiss or spanking to their order, if they give an additional compliment to the server. And the server then decides if they actually want to do it.