It's a plugin from the Legacy Bundle tools by Kaktak. https://kaktak.xyz/plugins/legacy/splinecopy/
It's like Instance object that creates a single spline object from my Symmetry/Cloner splines.
I'm not sure it's possible to use capsules to select any polygons with less area than a certain value and delete those because as you can see as the matrix moves some fragments get smaller near the edges making some clones appear denser on those parts.
grid.c4d
Rectangle random subdivision ( unoptimized and dirty but it works 🙂 )
Use the range node to subdivide
Viewport
Graph
Subgraph
199_Rectangle_division.c4d