Definition
Calendar spam is the abusive tactic of injecting unsolicited promotional events into a user's device calendar - often via a deceptive prompt that a page or ad tricks the user into accepting, or a subscription link disguised as something else - so that reminders and alerts for gambling or other offers appear directly in the user's calendar with notifications. It exploits the calendar's trusted, high-visibility notification channel to reach users repeatedly without a normal opt-in.
It is widely classified as spam and abuse by platforms and app stores, is a violation of their policies, and in many jurisdictions breaches electronic-marketing and consumer-protection law because there is no valid consent and the mechanism is deceptive.
In context
For iGaming, calendar spam is squarely a grey/black-hat tactic and a compliance non-starter for any licensed operator or compliant affiliate. It reaches users without valid consent, uses deception to establish the subscription, and cannot be reconciled with advertising rules that require identifiable advertising, genuine opt-in for marketing, easy opt-out, and no marketing to self-excluded or at-risk users.
An operator whose brand appeared in calendar-spam promotions - even via an affiliate - would face platform action and regulatory exposure.
Affiliate content should treat calendar spam only as something to warn users about, not a tactic to describe operationally. A responsible-gambling or online-safety explainer can tell readers how the trick works (a deceptive "allow" or "subscribe" prompt), how to remove a spam calendar subscription from their device, and that legitimate operators do not market this way - which is genuinely useful protective content.
It should never explain how to set up calendar-spam campaigns or frame it as a channel. For a compliant affiliate, the practical position is that any marketing mechanism relying on deception to obtain access, or bypassing the user's normal consent, is off-limits regardless of performance, and calendar spam is a clear example.
Worked example
An affiliate's online-safety content warns readers about calendar spam: how a deceptive prompt adds unwanted gambling-offer events to a phone calendar, how to find and delete the rogue subscription, and that legitimate licensed operators never market this way. The affiliate never uses or describes the tactic as an acquisition method.
Related terms
Frequently asked questions
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