Depends, if you are small-medium account you can hit top tags in matter of 5 minutes after post. But one advice, don't buy them. There are at least 20 mobile apps which you can fill with some random (fake?) accounts and collect coins to use on that main account which you need them.
Forget what people say. They like to tell you moral stories ( oh fake likes, oh no ) but you have fake instagram, promoting something/someone/random photos from instagram else?
I always do fake likes with apps, but only after like minute of posting on IG.
Catch is to spread. Let me explain. If you have coins for 2k likes, don't use them at once.
Use 500 at moment when you post photo, after 2 minutes another 500 and so on. That number can scale, depends on your instagram follower ratio. Don't order 5k likes if you have 2k followers LOL.
And yes, i was top post on most used tags in my niche #babe #sexy #fit #fitness #instafit #beauty.
After few top tags, you will see real followers and likes + comments, because you are top post. People love popular things.
So yeah. Use common sense. Pretty much.