How to get instagram followers fast cheap?

Hi! I recently noticed that many people are trying to quickly increase their Instagram followers, and I came across a bunch of different methods — from paid services to “like-farm” strategies. I want to understand what really works without the risk of account blocking. Have you personally tried a quick and inexpensive way to increase followers? Which services or methods were effective for you? What worked better: automatic tools, targeted advertising, or maybe some “life hacks” for organic growth?