Good thing for sure!

If it were me and the lady behind me turned it down like that, I’d probably just say something like…

“Well I was blessed today, so I figured I’d pass a bit along. If you’re sure you don’t need it yourself, then perhaps go buy a meal for a homeless person or buy a kid a toy for Christmas. Pass it forward.”

No evil here, you did a good thing 👍

I dunno, exploding golf ball maybe?

Disclaimer: Nope, I’m not gonna do that, nor am I making any serious suggestions.

If the compressed files are of the same/similar format, more compression is possible as the algorithm can detect more related patterns to compress.

But if you toss in a variety of file formats, compression will tend to suffer more.

Sometimes, the easiest way is just to try and see, different formats lend themselves to better or worse compression.

The files that tend to be worst at compression are the ones that are already compressed themselves.