I don’t know hwy , but lately , when I open my fiverr Inbox, I find some videos about treating animals and stuff. I don’t know why or how
Seee the image attached.
What the hell?! Piggly 
wiggly is in the building.
Are you sure you didn’t install a dubious browser toolbar or something?
Animal cruelty is BAD, BAD, BAD!!!
no, nothing on the browser, and it’s only on Fiverr,…
Happened like 3 times for me…
I don’t know what’s that for
This is really weird. I would submit a ticket to customer support and send them those screenshots.
Sure,
It is weird, when it happened the first time , I thought that the customer found a new way to attach youtube videos.
but when it happende the second time, on a different message, I was like what is that?
thank you. 
Either those are ads in Fiverr page or adware in browser 
You can use extensions which blocks add for a test. If don’t work, better to send those images to CS as @annai80 said.
First time hearing about this piggy stuff on Fiverr!
Hello.
I am using Adblock on google chrome, and rarely get ads on the websites (that contains ads)
that’s why It was weird , when I found it on Fiverr , and specially Fiverr’s Inbox…
Okay, now it seems not only weird but also mysterious 