I think patio11 is spot on here. Lifecycle emails are very pragmatic. They might be annoying to some users but in general they are a great idea.

related: http://www.behaviormodel.org/

"My Behavior Model shows that three elements must converge at the same moment for a behavior to occur: Motivation, Ability, and Trigger. When a behavior does not occur, at least one of those three elements is missing." -- BJ Fogg

=> If they signed up for your service and your market positioning/signaling is not absolutely terrible chances are you've got people who are both motivated & have the ability "to do" and might just need a reminder/nudge :)

Of course lifecycle emails can be optimized but I applaud Weebly for having looked into something that so many companies don't even take the time to do.