If you look at Mystik Inn, if it only made $200,000 then it's probably running at a loss. This demonstrates that even a very well produced clone will find it difficult to earn a decent return on investment.
It all depends on where one lives. World does not begin and neither does it end with USA or UK. $200,000 would be considered a very large amount in many countries and would, indeed, make living for the developer rather easy and enjoyable. Average salary in my country is roughly $800, so an income of $200,000 would be greatly appreciated by any developer here. :)
Barney