I would say none of the above, same for any other YouTube buying service. If you're going to want to build a video channel for the long term, YouTube will eventually catch up to you and either penalize your channel or suspend it. I guess if you're looking for short-term results, these services work to boost view counts. But long term you're screwing yourself. I mean good lord people, these views are not actual human beings interested in your content. They are bot views, plain and simple.
Maybe the best you could hope for is that a service employs tens of thousands of people and pays them 1 cent for every hundred videos they view for their clients. So maybe yes, they could be human views but Google is not stupid, they will pick up on a pattern eventually and then penalize your channel as a result.
I will remind you all of this nuclear bomb Google dropped a few years ago:
http://www.huffingtonpost.com/2012/12/29/fake-youtube-views-cut-google-audit_n_2380848.html
Who is to say that won't happen again tomorrow? Maybe not tomorrow. But it will.
Anyways, yeah, if you're using YouTube for blackhat purposes, then hey, more power to you. But if you're building a legitimate channel that you'd like to sustain for the long term, stay the hell away from these services.
Dont think you understand the point of buying youtube views and the beliefs and rules of youtube?
Buying youtube views is only done to jumpstart your channel, and get you seen quickly. Its like making a store in the desert, no one is gonna see you or buy from you. But if you pay to have a road made through the desert then you might start getting a few people purchasing from you every day. Buying views is literally a thing to get you seen and then let you ride youtube organically from there. Some people use it incorrectly although, but that doesnt mean buying views isnt a good investment.
And on your point of youtube might suspend you, they cant. Youtube cannot suspend a channel for buying views. If they could what happened in 2014-2015 would be going on still. Channels being banned all over the place. The reason is there is no 100% proof you are buying views for your own channel. because of this, banning a channel for the act isnt justified, and just cant happen in the community. Its like a Judge saying a man is guilty without any proof! What if he is innocent and someone set him up? How easy would it be for me to get a youtuber i hate banned by just buying views for him, and letting youtube screw him over?
YouTube cannot ban channels for buying views, They simply wont allow you to make money off of it.
Buying views is simply there to help grow your youtube channel quickly, and is suppose to be stopped after a goal is met, and you are receiving the organic views you wanted.
Although what im kinda annoyed about with your reply, is that you didnt even do any research..? For instance QuickViewBuyer is a Marketer not a view seller technically. So basically they advertise your video for a short amount of time and for a small amount of people, and you pay a small amount of money for the advertisements.
QQTube also has its own system of Social Excanges where people get views, And YTMonster literally only allows real people if you've ever used it or seen it.
You didnt even do your research, yet you still came here and spouted nonsense, judging multiple people as if you know the facts.
Please do not spout incorrect facts because you obviously dont know what your talking about.
Thanks.