As soon as that feature rolled out, I started adding it to coax back managers. I have seen about a 40% return on that investment. Maybe Phil could add a little copy and paste to the Arborist page. I tend to use a lot of "butter" to try and increase interest. My private message goes something like this:
Hi Bob, Hope this finds you well and I hope it finds you! You have a merge pending on this profile which is going to ADD information to YOUR family tree. Please review by scrolling down to the bottom of this profile page, select compare, and complete with one of the three options.
I noticed that you haven't been on WikiTree lately, and you might be surprised to see some of the great new changes. One is the feature under FIND at the top right of your profile screen. If you select PENDING MERGES, you now have the option to select which ones are waiting on you to complete! It's GREAT! And each merge will add to your family tree!
Thanks for all of your contributions! Hope this merge helps in your research.