[SafeGraph Spend] Panel change in each states

We look at how the total number of customers in the dataset changes over time using Spend Transaction Panel data. We discovered that some states, such as Iowa and Idaho, had a sudden increase in total number, which we can attribute to the addition of data sources. However, in a state like California, nearly half of the original data is lost. Is there a reason why the data sources disappear in certain states?
n_customers

@choh this panel is made up from data from a variety of financial institutions. It’s common and expected for institutions to be introduced and dropped from the panel over time. Depending on the adoption of those institutions regionally, it may impact various geographies differently over time.