Short answer
Yes. Third-party shops sell follower packs. Instagram does not sell “followers” as a product the way Promote sells reach.
Buying is a gray area under platform rules — treat it as optional social proof, not a growth strategy by itself.
What you should expect
Faster social proof on a public profile.
Possible drop-off; good shops offer a refill window.
No guarantee of sales, views, or algorithm love.
When it makes sense
Launch moments, portfolio sites, or early proof while you post consistently.
Not a substitute for creative, offer, or ads.