[SafeGraph Spend] Is the source of the dataset stable?

Hi, I have a question about the scale of the Spend dataset. I wonder if the source of the dataset is stable or if they use more sources as time goes on. I am concerned about a situation in which, for example, the number of transactions in a specific POI doubles in 2020 compared to 2019, but this is due to the dataset covering a larger portion of the population.

Also, could you share the slides from this video? Deep Dive into SafeGraph Places and Spend Data

The panel will always slightly change over time, which is why they post a Spend Transaction Panel that you can use to normalize the data: https://app.deweydata.io/products/4d1e0f75-f69a-47ef-8c5a-285899708fc2/package