In my instagram marketing last decade thats what we did.
While others were imagining that people "buy likes", or actually were dealing with bots, we were doing this for our clients.
Basically you get meme accounts to do a promotion of a profile that is currently private, and all the followers to a private profile get queued up, you can queue them up in the thousands or hundreds of thousands. when you unprivate the account, only like 100 of them get approved to follow you at once, so it adds up like a currency you can spend whenever you want. to mass approve you have to toggle private and unprivate over and over again, or approve the requests yourself or via API. either way you can only pull a list of 100 or so at a time, but you can keep them in the "requested" pool forever until convenient.
So you can grow an account with like a few hundred followers to a hundred thousand+ real followers very quickly.
But engagement is more important for the utility value of the account, and so you can also post an image with all the hashtags and location tags while the account is private, and let your new followers begin engaging with it. And then unprivate the account and even more new followers begin engaging with it, and then it becomes the TOP image in the hashtag.
In prior versions of instagram it would also be in the activity section in a large web of followers of followers.
For myself I have used one of the popular quickly and cheaply grown accounts to slide into the DMs of local women. In general on dating apps, women are funneling people to their instagram profile to ignore them. If you have a popular account its a night and day difference. I don't even attempt to match with them on the dating app, I just message them on IG straight away from the popular account (30K+ followers). Real dates and intimacy off of that, even in San Francisco. Skips the queue.