I used to never get spam in my GMail. Now, every once in a while, I get spam in the form of Google Drive spam (pharmacy stuff) and then I get "You've won Amazo

I used to never get spam in my GMail. Now, every once in a while, I get spam in the form of Google Drive spam (pharmacy stuff) and then I get "You've won Amazon Rewards!!" type of email. It's very strange.