Hi Huihsing, Although it is certainly easier to create one program to import all lists into, it does not only become more complicated for data maintenance, but also reporting. I'd recommend a few things here... - For any purchased or rental lists, have these have their own programs. So you'd have a channel specific to this source (with statuses like member, engaged) and then one program per list provider, per period you want to report on (usually this is quarterly). This way you can see how successful these leads are per provider (define engagement), include costs and that opens new metrics. - For events if possible I'd recommend integrations (like webinar provider integrations) but I know that's not always possible so for things like 3rd party events, I'd still keep the lists static but have them live within the event program and set the correct membership status. This also allows data points to be set through flows once "added to list xyz" -- things like acquisition, lead source, lead source detail, etc. Happy Friday, Kim
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