Pricing could be based on usage.
We currently use Studio 3T to support some legacy projects that require us to open Studio 3T once every couple of months. For current use, licenses do not "pay off" for us.
We are happy to contribute. However, it would help us if you had a more flexible pricing option, say 1USD per hour of usage for this usage pattern.
We will open new projects that use MongoDB as a data storage backend and hopefully we will use Studio3T more.