I would be pretty annoyed by that--basically, 60% of what you bought is unusable. Hope you can trade it 1-for-1 for some LPP brass.
I pick up range brass and lately have started to notice some of the SPP brass showing up.
I find it annoying that I generally don't notice them until after de-priming and attempting to prime the new case.
I have been culling them out and tossing them in a zip-lock bag while loading. I have maybe 100 so far. When I get a bag full I will see if I can give them away.
Edited to add--thank you for bringing this up. I just went and sorted through three ~200 round bins of cleaned brass, and removed a bunch more of the SPP brass. My next loading session will be far more enjoyable without the distractions and interruptions.