RPA Blue Prism integration with Appian - licensing

Does anyone know and can share how purchasing & licensing Blue Prism via Appian Corp. works? BOth tools are expensive, when purchased separately; so we are hoping that dome type of "rebate" or savings can be achieved by buying both as a "package" from Appian. The user Karthik mentioned (in a thread, Jan 2017) they created a service account and the BOT logs in to Appian using the service account credentials. Does that mean that many BOTs can use a single Appian user license? Are there other licensing models, based on number of BOTs and/or number of Appian processes or tasks?

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