Complex sentence: It got attention for selling comics digitally that are DRM-free, thereby allowing users to download their comics in PDF, EPUB, and the CBR or CBZ Comic Book Archive file formats to their various electronic devices.
Split into simpler sentences: It got attention for selling comics digitally that are DRM-free. Thereby allowing users to download their comics in PDF, EPUB, and the CBR or CBZ Comic Book Archive file formats to their varying electronic devices.