Yes, trusting random new people to change the site's code is crazy.
And I really don't see why anyone would chose to rob a few users in a very obvious way when they have the option of stealing using the seeds in an invisible way, forever.
If the "anonymous dev"-story is true, there's an explanation for this possibly:
The new dev didnt have access to the server seeds. So he cant steal directly.
But by making some players lose more, the site has a higher profit. Gains more commission. Dev's cut is worth more coins.