Are your non-compete contracts with departing editorial staff (or former publication owners) as thorough as they need to be? I've definitely noticed a trend these days of folks who are under editorial non-compete after they leave their companies, starting an email newsletter and growing an opt-in list while they twiddle their thumbs waiting for the non-compete to end. Then, the day it does, they flip the switch and all the readers they've gathered on that free opt-in list (many of whom include your long-term buyers) suddenly get an offer for a subscription product that looks like yours, smells like yours, but perhaps undercuts yours a bit on price. So, double-check that non-compete language to make sure it includes all sorts of writing and publishing, not just print and/or for-fee.