I have donated to ECW, there's nothing wrong with that. Has it occurred to you that google's own algorithms will drop ads into blogs that the AI thinks appropriate? That's why when I looked at an aitr-travel website the other day a funeral services company sent me a pop-up.
Certainly Google ads can pop up anywhere. However that is not the case with the Rossi ad on eCat World. That add is embedded into eCat World script and is not a Google popup. I.E. Frank has put it there. You can inspect the page and see :
<img width="250" height="430" src="https://e-catworld.com/wp-content/uploads/2019/08/ecataug.jpg" alt="">
This html code states the image is an e-catword.com jpeg file, not a Google ad.
Ps. I do not think it especially wrong to donate to eCat World in general, although I think to the world at large, eCat World would be considered "aluminum hat" territory! The very reason why LENR -Forum does not allow alien abduction and other very fringe topics is that it would destroy it's credibility. ECatWorld is doing nothing to increase LENR credibility, but is very likely helping to tarnish it. Just looks at the posts and the praise of Rossi !