Technically in the grand scheme of things, they aren't making that much money. It is just a lot of money for a pornographic title and its a lot of money for those of us not making that kind of cash each month.
Considering that in Germany the average salary for a programmer, is 50,000 Euros (Link =
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), which is roughly 60,000 USD per year, or per month it is $5,000. Not sure how many staff they have, but if they had 15 staff, that would be 75,000 USD per month. Then they'd also have to pay for their lease, electricity costs, occasional computer breakdown, entertainment/food for off-time, and computer upgrades. So the actual amount in the "green" isn't as much as you may think.
Very few people build games for the love of the community. Not sure what this argument has to do with anything. Plus, the developers of Wild Life only "tolerates" this community, but doesn't actually "love" it.