But Mass Planner shouldn't scroll further down.
As far as I understand, it should only follow max. 50 most recent followers of a target account per day. If the target account gained only 30 followers on a day, mass planner shouldn't scroll down, it should only follow 30 people.
All of my target accounts have over 10k followers. A account of this size should gain at least 30 follower per day organically.
Beside that, it worked well for a week, so you could expect that mass planner finds enough accounts to follow.
Any other suggestions beside changing the sources? @Said