Bitcoin doesn't need sex to sell, it sells itself. That being said, I do think the sex industry could really benefit from bitcoin. I think it's only a matter of time before they get involved.
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Sex DOES sell...almost anything. I hope it works.
The problem is that this is mostly appealing to dicks in more than one sense of the word. If you want people that are not dicks and/or teenage boys to take bitcoin seriously you should focus on something different. Before anyone gets offended by that statement I see no problem with the videos or the idea behind it, but it will not get bitcoin anywhere it is not already. Paying people on webcams is already possible with bitcoin, adding weet t-shirts and begging for donations is nothing new.
Well dicks are still people and they still help bitcoin adoption regardless of how immature they are but people are going to try use or exploit bitcoin any way they can because its just another way to make money for some people.