Hence the term POP, dude. POP-ular music. Pop isn't really a genre, thats the mistake. Pop is anything that is highly popular, and indeed, matchbox 20 is that. Pop is a bunch of genres combined into what can can be played on the radio under one heading.
And anyways, even if the above wasn't the case, matcbox 20 hasn't been "indie" in quite a while, just so you know. Indie, or Indie-pendant, is another one of those pseudo-genres that combines everything under a circumstantial heading that has nothing to do with the type of music.
Anyways, , there yah go. Helps to know the meaning of the worRAB you use, jrkul.