One toggle turns alert and account emails on or off. We never send noise.
EarningSpike only emails you about alerts and account updates, never marketing noise.
In Settings -> Email, the Email me about alerts and account updates toggle turns those emails on or off. Turn it off and we stop emailing; turn it back on any time.
Alert emails are the ones tied to your watchlist and alerts. Account emails cover things like billing and important changes to your account.