myLot earnings depends mainly on which activity ?

All of the above. The more interaction, and quality interaction, that you have on myLot, the more you will earn. I've only posted on image. It earned three cents and no more regardless of the numbers of views. I have not handled any referrals but you are suppose to receive 25% of the earnings of your referrals according to another post. Ultimately, the more you do in any of the myLot activities, the more you will earn. I'm all for being well-rounded.

I would have to say referrals as well. I've tried the other two ways and it changes from day to day. I'm pretty much baffled on earnings!

I would guess the referrals would be the most $$ making. Not sure on the payouts on it though.