Vote farming is when an account posts or comments in a string and upvotes the entire string. Here's a prime example. It's just a (period) comment replied with a (period) comment and so on and so on. All comments are upvoted.
Another type uses Steemit accounts with Steemit delegations and maybe a 100 or more upvotes on those comments or posts.
Another type buys delegations from services like Minnowbooster and upvotes their spam or plagiarized posts/comments.
The ones you're getting with the spammy comments (nice, great, I follow you etc) are constantly everywhere.
You can flag with us and get rewarded for your flags. Here's our Discord.
Interesting and thank you. I guess it doesn't matter what the system is, someone will try to game it.
I might do that. I typically don't go too far out of my way to flag stuff unless it is something really egregious but I do get kind of mad about the scams and the people who try to lure new users into wasting upvotes on their spam or into following them. I fell for that when I was new and I am still cleaning bots and spammers out of my following list lol.