I think they are probably on par with what they expected. Jorb and Loftar aren't stupid, they knew they were marketing and alpha after all.
I play during all times of the day, even when I wake up to piss at night I'll swap out some curiosities and I see anywhere from 200 to 900 players online any given time of the day. Especially now that the free playtime has expired for most, I'd say probably more than half of those are subscribers.
If 500 players were subbed for the minimum amount of $6/month - Thats $3000/month Jorb and Loftar are getting for a game they were hosting for free anyways.
Of course, this doesn't include one-time purchases such as the account verification where they could have made even more this first month as a lump sum. I wouldn't be surprised if they already made over $6000 - Remember there were 1800 players awaiting launch. Which honestly, still isn't that much for the work they had to put in to make this awesome game.