Oy vey! So many companies at the center of daily life. It is possible to replace them however :-)
Most of them, yes.
Even if you want -- say a Ford, a Nike, or Converse -- you could buy them 2ndhand.
OTOH, if you "wear" any of the above, you are still a "living testimony" to each of them. You're "modeling" or "marketing" their products for them.