Teaser ads on VKontakte, impressions versus clicks?

Question

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I read a lot about VKontakte advertising, tried it myself, in the big total I found the cost of a click on average 7 rubles. The cost of a click when buying impressions is also about 7 rubles, some articles on the Internet say that people manage to drop the cost of a click when paying for impressions up to 20 kopecks, but there are no clear decisions, who has experience how to do this?
I’m also interested in the mathematical model, according to which the cost of a click or impression is calculated, it’s clear that the ad ctr and bids of other advertisers are involved, but the rest of the targeting is involved in this completely from the ceiling, you can select a parameter and get, say, a cost increase twice. Who has any recommendations on pricing the cost on VKontakte? how to manage it?

Answer 1

As far as I understand, the algorithm should be as follows:
CPM is considered. Either you set it manually (if you are placing with paid impressions), or it is ctr*cost per click*1000. All ads that can be shown to this user are selected. The ad with the highest cpm is selected (well, or such an ad is selected with a high probability).
Those. The higher the CPM of an ad, the higher the chance of it being shown. If you pay for clicks, then an ad with ctr x and CPC y will be shown with the same probability as an ad with CTR (x/2) and CPC 2y . Well, vice versa. An ad with cpm x*y*1000 will have the same impression probability (if you pay for impressions).