I hadn't heard of this service until you posted it and had to go take a look to see what it is [
here's a link for anyone who's curious]
It certainly looks like a viable option for finding compelling images to include in marketing materials but I'm wondering just what you get for $97... and how often do you anticipate needing and using something like this? I guess if you are doing a lot of marketing for yourself and on behalf of clients it could be a nice resource to have on hand the way designers have libraries of graphics on hand.
There is
a place you can get some for free by signing up for their newsletter. I'd take a peek at the freebies first for sure...