@Geoff Is this a feature whose development you would fund? If so then send me a private message and we can discuss it.
Hi Duncan, GregMT previously raised a question back in September regarding an old version that you had developed that already provided for this …
Whether the generation of a pseudo list could be created on the fly when the scheduled campaign using segments is processed is another matter - that may be an even better solution.
If this could be re-incorporated into your current version of your plugin, some of my other requirements may not be necessary. As he said, parsing over 100000 records to send out 3 emails takes considerably longer than just sending to 3 subscribers.