Hi there!
Thanks for getting in touch! Unfortunately, we aren’t currently offering any bundle deals for Events Calendar PRO and Event Tickets Plus, nor do we have any ongoing sales promotions at this time. However, we do provide coupon codes to our users from time to time for certain occasions–the best way to keep up with these would be to follow us on Facebook or Twitter, or subscribe to our newsletter. (You’ll find the newsletter sign-up form at the bottom of this very page!)
Regarding the added functionality of PRO, you’re correct in that widget shortcodes are a PRO-only feature. However, you can easily add extra content to events pages via template customizations, which are supported in both our free and paid versions of The Events Calendar. Our Themer’s Guide has the scoop on how to get started with template customizations for our products!
Does that help to answer your questions? Let me know if there’s anything else I can do to assist! 🙂 Thanks again!