My bonus disappeared, did it expire?
Almost certainly yes. All bonus bets have an expiry date, after which they disappear from your account automatically. Letting a $50 bonus bet expire is effectively a $35 to $40 loss, so keeping on top of expiry dates is an important habit.
The most common expiry period is 7 days from when the bonus was credited, but this varies by bookmaker and sometimes by individual offer. Always check the terms for each bonus rather than assuming.
How to find the expiry date
The quickest way is to check the bookmaker's terms and conditions directly. Open the relevant T&Cs page and use Ctrl+F (or Command+F on Mac) to search for "expiry", "expire", or "bonus". This will take you straight to the relevant clause.
For example, Sportsbet's bonus bet terms state that the bonus must be used within 7 days of being credited unless otherwise stated in the offer terms.
How to avoid losing bonuses
When a bonus is credited to your account, use it as soon as a suitable opportunity is available rather than leaving it sitting there. If you are waiting for the right odds, set a reminder so it does not slip past the expiry date unnoticed.