I guess we can infer that trial accounts don't get much GM investigation, any reports basically result in a ban. I did create 3 new trials when I started multiboxing last month, but I immediately upgraded them with my retail keys since I knew my PC could handle 5 windows no problem. Refer a friend gives 30 days on your main account for each one, and the trials add 10 extra days to your playtime (so 40 days with retail key before you have to pay monthly fee).