In general people using classic amiga hardware has no gfx card, i bet for it.
I'll accept that bet! I think many people still using Classic Amiga computers have graphics cards for them. I have a graphic card in all my A2000's, A3000's and A4000's. I even tried to get a graphic card working with my A500 with a Sling-Shot Pro, but it would not work with my GVP A530, so I gave up on that idea. Although not strictly a graphics card in the sense that it will provide 16bit, or 24bit screens, the IndivisionECS and IndivisionAGA have greatly improved the screen displays of many more old classic Amiga computers.