I can say this can happen, and not necessarily suspicious.
In my family, I am in charge of changing the SBD or STEEM to the currency local.
I'me too, in the charge of about 4 users money when they want to turn them into local currency (My brother, two sisters and a friend of family who is also in charge of his brother.) Because they aren't technical they tell me whenever they want to use SBD for something and sometimes I find it easier to use them through my own account.
Don't know if that is considered farming.
By the way @osmerj: Farming and Not Agriculture is the when you make more than one account and use each one of them to get money then put all the money in one account to cashout. Like what you did.