how did you find that out?
200,000 keys approx (give or take 10-30k) and averaging $10 per key (keys prior to steam were $20 which would make up for mass sales for $5 during steam sales) means lowball estimate is $2 million
that said, not all went to badspot, and even then as someone else said its over 11 years, which rounds out to $200k per year on average in revenue. probably on avg 40% went to badspot (steam iirc is 30% revenue to developer, but not sure; amazon not much better either) and thats like $100k a year at best