What caused this change of heart? I doubt it's the good nature of the site owner?
What I think is that the site can not just yet be trusted as they have long time be misleading people into thinking they are purchasing bitcoin not knowing it is bitcoin cash, their can still be a change of mind especially during bull run to change it back to such in a way people will think it is Bitcoin but not knowing it is bitcoin cash, I believe this can be done later in the future or during bull run.
What I think will cause the recent changes of heart is that they have came into thinking it is not working for them, or not working for them anymore. Before, during bull run, we see how bitcoin cash do move and rise, but it all changed after 2020 halving. I remember Bitcoin cash to be the 4th highest rank for long time until 2020, and now at 11th oosition, and possibly new coins may still surpass it. So, this could make bitcoin cash CEO to thinking that is not working for them anymore, or that people are getting to know they are using it to miskead people and people not trusting them again, and decide to remove it.