Ideally anything more substantive than 'participant'.
I wasn't able to find anything using Google search or Word's synonym tool, and I'm looking for a more personable alternative to using the term 'opt-in' as a noun referring to people.
Ideally anything more substantive than 'participant'.
I wasn't able to find anything using Google search or Word's synonym tool, and I'm looking for a more personable alternative to using the term 'opt-in' as a noun referring to people.
What context are you looking to use this in?
In some cases, adopter might have a similar connotation, in particular as it's more "active" of a choice. This comes from the 4th meaing on TFD, "To vote or accept".
In other cases, member is a good choice: a marketing list has members. It doesn't have quite such a strong sense of agreeing to be on it, however.
Subscriber has a bit more of a positive sense, although it usually has more connotation of proactive agreement (rather than just checking a box while doing something else).
Participants is the right word. If they were unwilling, they would be 'unwilling participants'.
A common phrase for this is "people who signed up".
I would agree with Joe, though, context is key here - most words imply a context, so that would fit one word more than another.
Sometimes the name of the thing people have opted into is used - organ donors, churchgoers, gym members, marketing list subscribers.