Twitter Phoenix desktop - Keywords

What kind of keywords should i use to add new friends, i am trying to get referals for cashcrate ?

The current trending topics is a good place. Also if you're doing accounts 1-2 at a time you can use the terms Twitter or RT. Those terms get about 1-3k tweets a minute, so as long as you're starting the adding at least a minute between you'll be getting fresh users each time.