Well I expect Cathy was simply doing a link share at Izzy's request. Izzy links to sites, and then writes them and suggest they link to caca in return.
At a glance it'd be hard to see reason not to - and unless you've dealt with Izzy, or know others who have, you wouldn't know about the mess she can make of things, or how self absorbed she is.
If she wants to be taken seriously she needs to do some soul searching. If she is involved for any self serving reason, she needs to find another issue. And, she must do some serious apologizing; as well as take some responsibility for her actions - and work towards being more responsible in future.
Personally, I don't think she is willing or able to do any of this.
Maybe she'll prove me wrong. More power to her.