Hosting and Adsense Questions

Hello lovely community. Got more questions for you
Let's get to the point!! ( I already google them but I want to read your opinion and answers )

1) I run an adsense authority website , my article have materials inside , do you agree to put some ebay/amazon affiliate link there ?
2)I want to create a second website which will be an amazon affiliate website. Should I use my existing hosting account where I host my authority website ?? My adsense website will affected from something like this ??
3) Do you suggest to use stop words for my target keywords ?? Like how to ??

Thanks in advance