Generally Sex Sells. You'll notice this on car shows, they hire sexy ladies besides those cars.
Yes, but this is a different thing! This is just to spice up generally the thing that guys like a lot, cars with the thing that guys like even more, the girls!
For the OP, the cams would work, being connected to Bitcoin. This also needs to be done quality, with many girls being available all the time, not like Xotika that has few girls or none available most of the time.
But only video streaming, I don't know. There are so many options at the moment and why would people pay for something like this when they can get it for free.
OP is asking about only Bitcoin payments website. At this point it will be very difficult. To succeed project like this, there have to be different payment option.
I'm sure that porn industry is the best now (besides gambling) to adopt Bitcoin. But much easiest will be (and better for promoting Bitcoin) when existing good quality website will adopt BTC.
The problem most existing websites have is scripting... a lot of adult websites run their own payment system and at this point they don't want to invest (yet) to implement btc into an already very complicated system (chargebacks, recurring billing, etc...)
I have done adult webmastering for a long time and know a lot of the "do's and don'ts" but i can tell you that adult and btc might be a good marriage, if you hit the right buttons
1. Anonymous
2. The psychological "wall" for users to actually take out a credit card is gone
3. Pay as you go (for webcam)
4. One click payment
I do agree that more options might be a good thing...... for example use btc as primary payment option but give more payment options, all anonymous and all one click. There are more existing options i'm gonna look into.