I was just browsing the following mempool visualization and couldn't come up with a good explanation why the drops in unconfirmed transaction count are not of pretty much constant height but vary wildly.
My assumption is that every drop represents a newly mined block. Why are there apparently some blocks which contain very few or almost no transactions while others in contrast contain a relatively large number of transactions?
My only theory that miners are just too stupid to include all the available maximum fee transactions up to the maximum block size they can find seems .. too stupid to be true.
Please explain! Thanks :)