Services utilized massive networks of bot farms or coordinated "follow-for-follow" click networks controlled by automated scripts.
Previously, if a bot account followed 200 people per hour, Instagram would allow it. Post-patch, if an account performs more than 40-50 follow actions per hour, the account is instantly flagged as spam. Since "free trial" services relied on rapid-fire following, this single update rendered their infrastructure useless. 100 free instagram followers trial patched
If the algorithm detects a sudden influx of 100+ low-quality accounts, it may "patch" the benefit by instantly limiting your reach, ensuring those new followers never see your content. Services utilized massive networks of bot farms or