Before I go off on a small rant, I just want to address the fact that an upsell for MSOG is not totally unusual at an MP. I paid $20 for it once at Muse when I had liftoff too quickly. The girl was honourable though and said that she would only charge the extra if she actually managed to get me off, which with me would be a challenge. She did manage it, so I considered it money well earned.
Rant Time
To echo what Dirk said, the cost of MP's vs SP's has been discussed at length, but hey let's do it again. I'm personally ok with spending the extra cash on an MP for what many consider to be "less value". And I totally get where those people are coming from. "Do you want to get a blow job for $80 or a hand job for $130? Do you want to get fucked for $120 or a hand job for $130?" Well when you put it that way, the answer seems obvious. But I don't consider it in those terms. There's a much higher level of comfort and security when you walk in to a reputable MP location. The interior looks great, the ambience is pro, and typically the staff and your overall treatment within is excellent. That makes it worth a few extra bucks.
But then we start having problems at Lavilla and PA. Because the next step in making it worth your money should be that you're able to play eenie-meenie-minie-moe on the list of girls available and no matter who you pick, you get someone who's top notch. An established corporation should be implementing good standards of practice, twice-yearly reviews, consistent expectations of high levels of service, and so on. When you, as a customer, KNOW FOR SURE that you are going to get a great experience at an MP, that guarantee makes it worth another few extra bucks.
Do I think Lavilla and PA are doing this last part? Not necessarily. I have a decent amount of experience at PA and Lavilla. Maybe 25 sessions across the two locations in the last 7 years. Out of those 25, two of them have been wretched (a rookie who I may have gotten fired after complaining; and a loud mouth who got upset that she couldn't upsell me to a VIP). 20 of them were 6 or 7/10s. Good, but I never considered repeating, and 3 of them were outstanding (Noelle, April, and a polish woman whose name I can't remember. All three are retired or moved on). That's not a good percentage! And I think I've only avoided so many wretched ones because I check reviews first. Meanwhile almost all of my experiences at Muse, Flirt, and SRM have been 9/10 or better. Add that feedback to all of the negative feedback already in this thread and in others and you have a sub-par MPA who typically aren't worth those extra dollars.