STORJ does not have any profitability calculator that we can use to determine profitability, but if what they told in their blog post is true, BURST would be more profitable to mine than STORJ (if you call 1-2$ per month profitability)
I'm getting $5.50 or so per month over the last three months for 500GB.
I don't really understand how is that possible with 500GB. Everything they said and I read online you need about 10TB in order to earn what you are earning now (about 5$ per month)