The page you linked is about candidates for the Arizona State House. Amish Shah is running for the U.S. House of Representatives. There are still campaign finance limits, though ($3,300 per election per candidate, where the primary and the general election count separately; see here).
Applicable campaign finance limits: According to this page, individuals can donate up to $5,400 to legislative candidates per two-year election cycle.
The page you linked is about candidates for the Arizona State House. Amish Shah is running for the U.S. House of Representatives. There are still campaign finance limits, though ($3,300 per election per candidate, where the primary and the general election count separately; see here).