Now, the discount depends on the volume of generated traffic - the more traffic, the lower the cost per visitor.
The new cost per visit for robots is as follows:
0-99 visits: 0.005 USD
100-499 visits: 0.0045 USD
500-999 visits: 0.004 USD
1000-4999 visits: 0.0035 USD
5000-9999 visits: 0.003 USD
10000-19999 visits: 0.0025 USD
20000-29999 or more visits: 0.002 USD
30000-39999 or more visits: 0.0015 USD
40000-... or more visits: 0.001 USD