Performance issues

I have just tried the P3 performance plugin and tested my site. I could see that Wysija is quite a consumer, but I cannot tell why, I only have a register to newsletter form in the public site. P3 is running in the admin (so I am logged in), maybe it could influence, but I cannot get this. See it in a screenshot, here: https://imgur.com/ImiZ47b

The green one is Jetpack, but that one has lots of connections when logged in, in a public pages it does not do that.

https://www.ads-software.com/plugins/wysija-newsletters/