The digital versions are exactly the same as the print versions, just digital. Everything is there, including any ads. It looks like each page was scanned as is and made available on the computer. I just checked my last print issue against the same digital issue on my tablet, and any particular page number matches up exactly. I don't have my laptop on right now and it's late. But I'll also check this on there in the next few days. From what I recall, it's the same setup.
I do a lot of digital reading, but I know what you mean about having the print version to keep. So far I haven't heard that the print version has been discontinued, but I don't know where things will go in the future. I've heard money is tight, and apparently the actual staff working to put out each issue is small. Both of these things could cause delays. I hope the magazine can continue in some form.
Here's a link to the Zinio website: