Try a larger list and its 3. Should be around 6-7 right now (according to looking at twitch page)
https://api.twitch.tv/helix/streams?first=100&user_login=masondota2&user_login=xQcOW&user_login=monkeys_forever&user_login=Freakazoid&user_login=vsnz&user_login=paulflart&user_login=TheSushiDragon&user_login=cpense&user_login=AdmiralBulldog&user_login=Savjz&user_login=its_WiKeD&user_login=FATAL1TY&user_login=PaymoneyWubby&user_login=reimuowo
&user_login=jchoe_&user_login=Cardboard_Cowboy&user_login=LyndonFPS&user_login=xcaliz0rz&user_login=Skadoodle&user_login=Topsonous