Would I be in violation of these icons free license on my Android application?

Question

Since there isn't yet a Q&A site for legal issues and since this is related to an Android app, I'm posting it here, instead of Stack Overflow cause this is not code related.

I want to separate this question into 3 sub-questions which are all related though. These questions are about the Free, Commercial and Extended licenses of DryIcons.

1) Generally speaking, would I be in violation of the free license if I used some icons in my paid version of an Android app? I'm a bit confused... The free license has the following in the "Grant of Rights" section:

b. You may use the Licensed Material in any personal or commercial project unlimited number of times according to the DryIcons Free License Terms and Conditions;

From this I take that yes, I can use their icons in my paid Android app. But then I read this in the commercial license under "Restrictions":

e. Licensee may not use Licensed Material in electronic items for resale, such as website templates, electronic devices (i.e. computer, iPhone, phones, etc.) software applications, document templates, wallpapers, screensavers, e-cards or similar products that Licensee intend to sell or distribute;

Which one assumes the extended license is the one we need for a paid app. But isn't this a little bit contradictory? Doesn't that point in the free license allows me to simply use their work in paid apps?

2) Now, let's assume I really need to buy a commercial/extended license to use their work on my paid/commercial Android app, something I'll be in fact selling to an unlimited number of users.

Would I fall under the commercial/extended or the free license if I used In-app Billing in my Android app? With In-app billing I wouldn't be selling their work at all. My app would be free with a bunch of features and I would be also using their work. But since my app is free I'm also free to use their work as long as I give proper credits with a link to their website as they state in the free license (no problem doing that, I'm all for it). Then, with In-app Billing I would actually be selling extra features to my app (by providing an upgrade to a "Pro" version), not their work.

Do you think I would be in violation of the free license like this?

3) And now a similar situation as the previous point. What if, instead of In-app Billing, I would have 2 apps. One completely free using their work as the free license allows me. And another which is nothing more than an "unlock app", something that would unlock extra features on the free app. The "unlock app" is the real paid app and this app does not use their work at all.

Do you think this is exactly the same situation as in the previous point and that I'm just playing with semantics? What's your opinion on that?

Do you think I would be in violation of the free license like this?