Users signing up for a new TestCollab account have 2 options to setup their first project:
They can either add a blank project, or
Setup a project with sample data
When opted to have a project setup with sample data, you will get :
Test executions (runs)
The option to create sample project with data is available only at the time of signing up for a new company.
If not required some or all of the sample data including the sample project can be deleted (this is sometimes desired by the companies on free plan due to its limitations on number of test cases and test runs)