Apparently that is because your products are using Variants to offer buyers a range of licenses priced accordingly. If you temporarily disable Variants in the product's settings, then you will be able to send free links for that product. Make sure you copy the Variants config lines first and paste them somewhere else like a Notepad window for safekeeping, so you'll be able to repaste them back into the product settings when you re-enable Variants.



I'm not quite clear on why this limitation exists, so I've asked our Lead Developer for an explanation. Maybe this is just an incidental side-effect that we could remove in the next version of Admin we've been working on.

As I recall, I used the word "tedious" in my report to Development about the necessity for that procedure. :^)



As another alternative, I think you could create a dummy product using "Package files from other products", select the original product whose file should be issued, then Send Free Link for that dummy product.



For yet another approach, you could create a discount code for the specific product you want to give away, good for the full purchase price of the item, with Max. Use Count = 1 (so once it's used, it becomes invalid for everyone), and send that code to reviewers et al. allowing them to order the product for free. You could even create the discount with a list of discount codes (note this will clone the discount out into a series of separate discounts, one for each code), then just keep that list handy where you can issue one code from the list as needed.