Arojekt,
I'm not sure what you mean by bonuses. Anyone can swim up to three events in which they don't make the National Qualifying Times (NQT). Is that what you mean by bonus? It's quite simple. If you don't make NQTs in any events, you can still enter three events. If you make NQTs in one event, you can swim four (the one you made plus three that you didn't). If you make NQTs in three or more events, then you can enter six.
Arojekt,
I'm not sure what you mean by bonuses. Anyone can swim up to three events in which they don't make the National Qualifying Times (NQT). Is that what you mean by bonus? It's quite simple. If you don't make NQTs in any events, you can still enter three events. If you make NQTs in one event, you can swim four (the one you made plus three that you didn't). If you make NQTs in three or more events, then you can enter six.