Dirty company. I actually sold my Google mini-fridge that I received for 1 million clicks via PPC back in the day because they were doing some shady stuff.
Google slapped me for doing ppc to my own site, then found out there were doing direct to merchant PPC on same merchant.
Then doing the same to other affiliates when they bought Performics, rebranded to GAN - Google Affiliate Network. Banning affiliates doing PPC, then doing it themselves to merchants.
Then when they shutdown GAN, didn't bother to notify merchants directly, they made a short blog post than an affiliate noticed and posted on the forums. That's how a lot of merchants found out. Many merchants switched networks just because they were Google. I told the merchants back then not to hand their balls over to them, they had to learn the hard way. It's a lot of work for affiliates to be changing links over all the time when merchants go network hopping.
It's why I only use Google when necessary, if there is another option, I always use the other option.