I've been getting a lot of likes and comments from randoms on very old posts, like 2 years ago. They appear to be bots and the photos with have no hashtags. A lot of the comments are just tagging another account. The account tagged has a lot of followers and is not following many people. I wonder if this is a good strategy to gain followers rather than just liking random photos on hashtags. Any opinions? I also like using a dummy account to do the comment spamming and keeping your account safe. Now who knows how to do this?