Followers for the Last 30 Days:
=CONCATENATE(IMPORTXML("http://socialblade.com/twitch/user/aiz11", "//div[@id='twitch-summary-wrap']/following::span[1]//text()"))

Channel Views for the Last 30 Days:
=IMPORTXML("http://socialblade.com/twitch/user/aiz11", "//div[@id='twitch-summary-wrap']/following::span[3]//text()")