One of the issues of making all the services together is the discount. Implement a discount system across multiple SaaS has to do with sales strategy.

Standardize everything, including the costs, seems like the end of creativity. However, creating a massive checklist that makes the user choose between services and, step by step, simulate final costs (which will include computation, task management, monitoring, customer support, etc.) is a titanic job that could change within the next generation.