Pretty much, the author has three tiers of release for this game.
1) The public version currently v0.7.8
2) the patreon exclusive release which is currently on v0.7.9
3) The high tier patreon release. Typically first released as an alpha build (Typically with new sex scenes but lacking story content) then later as a full version. The alpha for v0.8.0a is currently not up on patreon
The current version of lustful sin hosted on this site is actually a leak of the high tier alpha build of v0.7.8. Which means that it currently lacks Rin's story content but does include her visor control scene. (Which is why Lustful Sin has gone so long without updating on this site, and it also means this site is currently behind the public release).