Just curious, how can we confirm the views are high retention views? Or even, how do we know this is safe? YT has detection algorithm to detect these kinds of abuses, so how do we know our videos or account won't be banned in the future?
First, never use the service with monetization on to be save. Second, the views are always retention and we check for it too. (you can also order no retention views, those are cheaper.)
And final, YouTube never bans, they only remove the boosted video when they find out. And if this happens you will get a refund.
If u have any more questions, let me know.