Forum Thread
A Frosty Creature
Forum-Index → News → A Frosty Creature2) You will never get any virus through those ads. All of these ads are analyzed by Google before and are definitelly just websites who want some more visitors.
The adoptables site in question may have used another advertisement company.

"made, done, happening, or chosen without method or conscious decision"
Some people just are not lucky if they haven't gotten it yet, or they haven't put in much effort (you have just over 1k clicks total, so you shouldn't complain :p).
I have done over 35,000 interactions since the event started. I haven't found a single Kyurem yet. And I'm not complaining because I know we have all the winter to find at least one. So I'm not worrying about it because we have a lot of time.
And I really don't consider myself unlucky, I think that the best I can do is to keep clicking. Complaining won't make Riako raise the chances of finding one.
I ended the Shaymin event with a lot of Shaymin in my userbar and I didn't make over 50,000 interactions in the whole month, and they were too common.
So yeah, I think you should stop complaining. And good luck!