Haven't use it in around 5 months due to lack of time, but I used that method for a long time with quite decent results. The way I did it:
- add 10 twitter accounts and set all tools with very low settings so they appear normal.
- scrape niche followers of what i was doing
- create a campaign that sent 500 mentions per day with all 10 accounts, that means around 50 mentions with each account.
- create a secondary campaign to post 30-40 normal tweets for each of the 10 accounts to "hide" the mention activity
500 mentions per day isn't much, but when you do this X 10 times it's enough, I didn't want to get all accounts in trouble. Got decent traffic back and interested people inquiring about what I messaged, so this worked nicely, don't know how it would work today since twitter changed a lot of stuff during the last few months.