The concerns are understandable.  I’ve seen this type of flow do well for some brands and not so well for other brands.  As always, do what’s best for your brand by testing, testing, testing :)

You can limit the risk by applying a flow filter.  You can do it based on collection, product or a random sample of subscribers.  For the Random Sample, you can adjust how many people you want to restrict it to based on a % (see screenshot below).  Hope that helps.  If you do try it out, please report back here.  Would love to hear how it went. 

Thanks a bunch! I didn’t realize there’s an option to limit this to a random sample.

What kind of key metrics would you keep an eye on to measure this test? I imagine keeping an eye on unsubscribes, as well as seeing how open rate, click rate and revenue perform.