It's good to see this coming. However I don't understand the price structure some vendors are offering. Take Zend Server(below is the link) as an example, why s

It's good to see this coming. However I don't understand the price structure some vendors are offering. Take Zend Server(below is the link) as an example, why should they charge a lot more on high-memory/high-cpu instance? Is it because the incurred traffic or usage is much higher? How does this compare to setup your own server but buy server license from them. https://aws.amazon.com/marketplace/pp/B0078UB5X6/ref=gtw_msl_title?ie=UTF8&pf_rd_r=1GWZN26BFTX1HZFPFDPP&pf_rd_m=A33KC2ESLMUT5Y&pf_rd_t=101&pf_rd_i=awsmp-gateway-1&pf_rd_p=1356058402&pf_rd_s=center-2 https://aws.amazon.com/marketplace/pp/B0078UB5X6/ref=gtw_msl...