Just general information to topics related to Landing Zero themes.
Landing Zero2 theme is free and it can be downloaded for free. LZ theme was originally my theme and I had agreed to use it for e107 core and move under e107Inc repository. The theme demo was on e107.org too. But there were limitations for the solution (it could use only core stuff). In fact, I had to strip many things in order to be a core theme. Plus, I couldn't maintain directly this theme anymore and nobody fixed issues related to it. Not mention that the demo was removed without a single word.
Landing Zero 2 theme is supported and it has its own forum. I had to mark it as premium and put into e107sk Easystore, because this is the only option how to not upload the full code on e107.org. If you pay for it, you just can get premium support (by email) or you can ask for new features. But the theme itself is in e107sk.com download section free for members.
And because there should have been the new core version very soon, I updated LZ2 to new rules and now it is compatible only with 2.3.0. In e107sk Easystore are available older versions too. I tried to put price 0.01Eur, but it was forbidden by e107.org as cheating.