As I have stated in the past, I watch and find VV more interesting than RLC more so because of the interactions between people who are just meeting and dealing with each other and the "project" for the first time. Obviously because of the frailty of the situation, one should be inclined to expect that sex will NOT happen every single night. You can't expect to throw 4 random people together and have them just jumping on each other every waking moment. But just because they (VV) put them all together, I also find it wrong to believe that they are just told to have sex for the sake of living in the house.
Having said that, I'm obviously not going to pretend that I don't enjoy seeing them have sex, and when you have 4 potentially uninhibited people living together (especially with the addition of alcohol), you also can't expect sex not to be involved. At the end of the day, it's the possibility and the anticipation of whether two people will fuck that draws me in, sometimes even more so than the actual sex itself. Think about how interested everyone was when Phil Tanya and Dizi was there and were all drinking together. The speculation of whether or not Phil was going to hook up with any of the girls is what had people glued to the screen. Same thing with when Christy used to flirt with Messa while he was still with Nastya. Sonia and Ivo fuck almost everyday and sometimes even multiple times a day, but there's nothing "interesting" there: no intrigue, nothing exciting. Just another couple like on RLC. And again I say this, but it's the reason why I don't even watch RLC; nothing really interesting with any of the couples, even with Masha and Sasha who probably have more sex than everyone in RLC combined. I don't even like watching girl-on-girl action but even I found myself tuned into Irma and Anna the night of New Years because the whole "will they or won't they" aspect, although I'm only 90% certain they won't which is actually down from the 100% certainty I had knowing Kamila and Kristy would never hook up.
So to answer your question, sex obviously is always going to be a factor in VV but that's not why I'm remain interested. I will always continue to "buy" into the project as long as they keep couples out and focus on keeping it at bringing singles in.