Each record that is either updated or inserted in the destination (data warehouse, database, etc.) is counted as one event.
If you have data sources that we do not currently support, we would add support for those data sources.
You can add any number of your users to your account. No additional cost will be incurred.
A source is a unique instance of an application from where you want to ingest your data. For a database, it may be a DNS name or an IP address, for third party APIs it may be a set of credentials or API Keys.
Yes, you can create any number of pipelines from the same source without paying anything extra. For example, you can create two pipelines reading from a single database instance and it shall still be counted as one source.
Events usage above your subscription plan's quota is considered On Demand and is charged additionally on top of your Plan.