Marketo Engage Source connector, "sample dataflow" toggle button behavior for incremental data

[itsMeTechy]

using marketo engage source connector, creating a dataflow, there is a toggle button "sample dataflow". As per the documentation it says that this toggle button helps to restrict historical data and can be used for testing purposes. 

But is there any impact on handling incremental data with this toggle button. meaning does it restrict amount of data being processed incrementally when this toggle button is enabled?