$20/hr was a contract rate. Your 1/2 million presumably is a salary (base). Not the same thing. $20/hr is roughly equivalent to $20k salary. $200k salary is reasonable for a competent developer who can hop on adding features to Gimp.
In my reality no developer (even a sh*y one) makes $20k.
In my reality no developer (even a sh*y one) makes $20k.