I remember Guldencoin also had a thunderclap and managed to get 100 supporters in 20 days or so. 500 will be really impressive but considering the marketcap is 3 times the size of Guldencoins, 300 should be easy to get unless there is a couple rich people backing shadowcoin currently.

I am still deciding if I am going to carry on supporting Dash or move to Shadowcoin for my anon coin.

I already see duplicate accounts supporting the thunderclap, so even the 34 is not individual people, hopefully more come.

EDIT: I made a mistake Shadow is 5 times bigger then Guldencoin marketcap so in theory 500 should be possible since Guldencoin managed 100.