The other guys have deal for seminarians and Bible college students to get about 9GB of resources that are accessible for the next 60 days. The idea is that your library is closed, so why not fill up your Bible software with stuff that expires about when your library will reopen.
The high level concept of a trial, expiring or subscription module is very interesting. I don't know if Accordance team has given it much thought, but as an option to try out certain resources I think it has its place.
I would NOT be interested in this mode replacing purchase-to-own for any module. The nice part about Accordance is that when you buy it, it's yours. I see the value here merely as a way to sample a broader range of stuff for a time.