Software-as-service pioneer Salesforce .com hopes to stretch its model even further by charging the independent software vendors on its online marketplace a percentage of their sales in return for helping them generate leads and close deals. Salesforce now offers more than 400 software programs on its AppExchange site, from 230 ISVs. Each time a customer wants to run one of those add-on apps, including accounting, human resources, and marketing, it must buy an end-user license from Salesforce. Now Salesforce is trying to convert more of its partnerships into direct revenue.
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