they are already novelty. the difficulty is too high to get anything useful out of them other than a few bit-cents a piece

a year worth of mining with starting at 10 and adding a new one as soon as you get enough coin only gives you an addition 7 units and  .08 btc in your hands calculated reference

then you are left with 17 usb sticks that cant really do anything.
this calculation of course is an estimation and assumes 30% increases each time and does not factor in hub costs.

its getting harder to mine while not losing USD. better save your power and just invest in coins not miners.