Filter marketing emails
I suggest that marketing emails be filtered the same as your web site. When I look at a sale on the web site, resources I own have the "add to cart" tag greyed out and the tag displays "owned"; and bundled resources some of which I own are dynamically priced with my ownership of some of the bundled resources taken into account.
I suggest Logos filter its emails the same way. If I get an email touting a package, the email should be tailored to my library, with dynamic pricing based on what I already own. And it would be nice not to get "last day to order free book" emails for resources I already own.
All businesses other than Logos that start sending me daily emails get unsubscribed. But not Logos - I actually enjoy getting a number of marketing emails from Logos each day. But some offer me a bunch of resources that look tailored to my interests - mostly commentaries, no original language materials, etc. - but then it turns out I own all or nearly all the resources being pitched.
You'll sell me more stuff if I know you're not pitching me resources I already own!