There are several times when adding a trigger to a price would be helpful...
Note: If your product is set up to allow the Purchaser and Participants to be different you may want to look closely when you set up a trigger. Triggers that are set to billing activated will cause the action to occur to the purchaser, whereas participant activated will cause the action to occur, you guessed it, the participant.
GDPR notice for those doing business in the EU: Please keep in mind when using triggers based on actions of your customers that you are in compliance with GDPR, actions such as these may violate rules in regards to consent and profiling. This message does not constitute legal advice should you have a question about compliance please consult a lawyer.