Travel Niche page

Good morning everyone I had created a travel niche page which had some great traction. The page was just liking posts on follow planner gaining between 50-200 followers a day. I reached 2500 followers in a matter of 2 weeks now crossing the 3500 mark I can barely get 30 followers a day and I am f/unf 50-60 people a day... my engagement Is great avg 18-40% depending on the post. What has happened to my follow though? Any help thanks.

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