The basic rule is that only one Flowsana account is ever charged for a given Asana organization/workspace.
By default, the account that gets charged is the first user that signs up for Flowsana which includes that organization/workspace. However, this default can be overridden by Flowsana support, so let us know if you need it changed.
As an example to clarify, let's say that consultant Susan Smith has a client ABC International. ABC International creates a Flowsana account and sets up a Flowsana workflow in their Asana organization. Then they invite Susan Smith to join their Asana organization, and she subsequently sets up a few more Flowsana workflows for them. In this case, ABC International will be charged for the users in their organization because they were the first Flowsana account which included that organization; Susan Smith will not be charged at all for that organization since she was not first.
Conversely, let’s say that consultant David Dow has access to his client XYZ Corp's Asana organization; he creates a Flowsana account and sets up a workflow for them in their organization. They like what they see and they sign up for Flowsana; their Flowsana account of course includes that organization. In this case, David Dow would be set to be charged for the users in XYZ Corp's organization since his was the first Flowsana account created which included that organization. Most likely this is not what either David or XYZ Corp wants, so he would contact us and ask to have that organization's billable users transferred to be charged to XYZ Corp. We would of course confirm this with XYZ Corp, and then would make the switch.