We did engagement photos, as you may be able to tell by my oh so Canadian cheesy profile picture. In case anyone's wondering, the matching plaid was meant as a joke, I swear haha! We always end up accidentally matching, so we had to do a picture like that!
We were also lucky to have a photographer friend that did it in exchange for a high five and some jewelry I made for his girlfriend. We've used them for our save the dates and website. I would definitely agree though, especially if you won't use them, to save your money for where it counts, the big day! Happy planning!