Regarding "1. Provably Fair system via transparency". @thedashguy you don't have your facts right. So let's make it clearer and maybe edit that paragraph.

Provably fair

In online gambling provably fair describes an algorithm which can be analyzed and verified for fairness on the part of the service operator.[1] Provably fair algorithms are often used in the operation of an online casino.

In a provably fair gambling system, a player places bets on games offered by the service operator. The service operator will publish a method for verifying each transaction in the game. This is usually by using open source algorithms for random seed generation, hashing, and for the random number generator.[2] Once a game has been played, the player can use these algorithms to test the game's response to his in-game decisions and evaluate the outcome by only using the published algorithms, the seeds, hashes, and the events which transpired during the game.

The benefit of a provably fair system is that third-party verification and auditing is usually unnecessary. Its major flaw is that it is susceptible to unscrupulous players or competitors who can claim that the service operator cheats. It could also potentially expose the operator to hacking attempts if there are undisclosed security flaws in the open source software.

From Wikipedia, the free encyclopedia

So " code being open sourced, having your reputation on the line" has nothing to do with Provably Fair system.

In order to gain credibility and transparency, every game result must be verifiable or else no one really know what is happening behind doors and even more problematic is how the winner is picked? How do we know if the winner was picked in a fair way? it's very easy to create dummy accounts and guess what, those dummy accounts will win the lotto and everyone will lose money except the house!

I'm mention this in this comment

Disclaimer: Although I'm aware of this problem I've played on this lotto to test out the game.