I'm in sort of two minds about Clinton and Faye's behaviour in this strip. Whilst I am a bit disappointed at Faye being so silly as to threaten a customer into giving a positive review, on the other hand, Clinton really had it coming for trying to
sell her a positive review. IRL, the world of on-line business reviews has quite a significant dark side to it and this strip sums up this problem in many ways.
FWIW, though, it tells you a lot that Faye considers a 'good review' to be: "They do great work, but don't sass them as they get scary!" Come to think of it, that was her philosophy at Coffee of Doom too, so she's still very much the same person in any way that matters!
It's a rude move to negotiate about payment for parts and labor after the labor's already been done.
Precisely. Now, if Clinton said something like "I'll do 100 positive posts if you agree to let me have 5% of the take from every customer who tells you: 'Clinton sent me'," then Faye agreed then
this would be a negotiation for advertising (if an ethically dubious one).