So I opened my wallet today and someone sent me two deposits of 0.00000546 btc
I am trying to identify who or why someone would send me btc randomly. my address is not posted anywhere online besides block explorers

The transaction is : 39b54f4e10800672a5f201cf3ff81d471274b4cff4d4423d35cf14eb4d2ff026

The weirder thing is he seems to send out thousands of transactions to active btc addresses.
Is this just generosity or something else?