It’s part of an active low pass filter that performs a band pass anti aliasing function.
Given those cap options, I’d use the 220pF. If it’s performing okay and you’re not getting any clock artifacts, you could be fine with the 100pF.
The new ownership made it pretty clear they didn’t want to be in the hobbyist space given their MOQs. I didn’t find much of a point considering them as a vender at that point.
It’s absolutely still funny looking. That poor thing looks like it has conjunctivitis and a black eye.
But, I am glad that that goof is getting some pals to hang with.