Spike in visits between 1 AM and 4 AM. Most visits are "sold out" items.

[PrairieWoodandForge]

In the past month or two I noticed a huge spike of 25 to 30 visits between 1 AM and 4AM. They are mostly visits on "sold out" items.  Maybe I have a customer who enjoys doing this? Or could this be an Etsy bot investigating something? It sure is odd. Does anyone have an idea of what could cause these spikes?

Thanks, 

Mike

[BagmakerSupply]

@PrairieWoodandForge: There are many bots that are scrapping Etsy for order details, some of them are the ones that collect sales data.