they are releasing under an OGL-alike and a Shadowdark-alike, so depending in what you wanted to do, you should be covered. From my (rough) understanding, the one case that is not is creating a new game or expansion and not releasing your stuff under the OGL-alike licenseDisappointed that he is basing it off of material using a Creative Commons license but won't himself release things with a Creative Commons license. Due to that, looks like a pass from me.