Dies to Removal

Regarding these bots that give you free commons and such, how exactly does this work? are you just trading with them and you pick out what you want for free? i'm pretty skeptical of anything listed as 'free', and this sounds pretty odd to me.

Can anybody give me the low down on these bots?

To access the free bot:

Log In to Magic Online.
Click on “ADD BUDDY”, and type in “MTGOTradersFreebot”.
Right click on the name “MTGOTradersFreebot”, and left click trade.

You can go in those free bots and pick cards, then hit trade and get what you wanted without giving anything away. Usually wont have much but you may find commons or uncommons you need.

The best is the MTGO Traders' one, but it's quite busy. There used to be another one from the Marlon chain, but I haven't seen it online lately. There are others, but with smaller selections of cards, or lame restrictions like you can only pick 3 cards a day.