I agree with this. They show your pins to other users for some time, but how it will perform in the future depends on engagement it gets during the time it's showed.
I realized this long time ago, back then I used addmefast to add likes and repins to my pins. But that's not really long term solution, your domain could get banned easily, which is, in my opinion, much worse than getting your account/s banned.
While I used addmefast to pump up my repins and likes I noticed most of those repins and likes came from really badly made fake profiles with only one board that was used to repin everything from addmefast system. That's probably what got my domain banned. Bunch of repins and likes from ugly profiles. So, don't buy fake likes or repins. Rather make 100 real looking accounts and use them to make your pin look popular.
You're not first who came up with idea like this. We had a guy who suggested something like this for Instagram. It's a good idea, of course our users would benefit from this, but I'm not sure how much time would take for developers to make such system. Anyway, I'll send them link to read this, since I also like it