So is there any possibility of making a monthly subscriptions, let's say 19.99 a month, to have access to all logos books but not owning any?
None at the moment.
No - since resources are being downloaded to your harddrive, that would be quite problematic to establish. Don't know about any future plans Logos has in this respect.
I brought this up to Logos directly and as Thomas said, it is not possible at the present time. There are many different parties involved with the copyrights to resources. Some are not even allowing access via iOS . If Logos were the only party it would be much easier to implement. There could be different levels of access and one could change their subscription level based on present needs and circumstances.
I believe someday they will offer a subscription model. Just not in my lifetime and possibly not in yours. [:O] I have used two subscription model academic libraries ( Jstore , Questia ) and neither is as user friendly as Logos 4. But in fairness, they were primarily designed only as reading libraries. Jstore Questia
edit: I wonder if a web-based subscription using only public domain works would be a good test run of the idea. It may prove their is enough profit to include current copyrighted works. At least Logos would not have to negotiate with all the other publishers to test it.
I have used two subscription model academic libraries ( Jstore , Questia ) and neither is as user friendly as Logos 4. But in fairness, they were primarily designed only as reading libraries.
I have access to JSTOR through my academic institution and it's great. And I have paid subscriptions to both Questia and Highbeam Research, which have lots of other good stuff. Also Religious and Theological Abstracts, but that's going to be in Logos at some point (if enough people order it in prepub). I also subscribed for one year to the Literary Encyclopedia, but I wish that were part of some larger library. I don't use it enough on its own to warrant the annual subscription fee, so I didn't renew it.
Cokesbury (www.cokesbury.com) also has a subscription model for many resources. If you're a fan of Abingdon Press, it's a good place to go for subscription-based services. Of coures, some of the primary commentaries in that model are in the pre-pub works at Logos for a lofty sum. Personally I'd rather pay the money up-front and have the full rights to the resource, but I see the place for this model as well.