An excellent example of crippleware (sense 3) is Intel's 486SX chip, which is a standard 486DX chip with the co-processor dyked out (in some early versions it was present but disabled). To upgrade, you buy a complete 486DX chip with working co-processor (its identity thinly veiled by a different pinout) and plug it into the board's expansion socket. It then disables the SX, which becomes a fancy power sink. Don't you love Intel?