Capital One Shopping - $80 in rewards
You get $80 in rewards if you are a first-time user of Capital One rewards, and install the Capital One Shopping browser extension, and keep it active for 90 days. I would also get $80 as the referrer after that time period.
https://capitaloneshopping.com/r/1741f672-2efe-4c66-b077-22f36fcdb4a0
The Fine Print:
The Refer-ee must install the Shopping extension within 7 days of creating a Shopping User Account using a referral link. The Refer-ee must then regularly use the Shopping extension and shop as they normally would, on their primary browser and with full permissions granted, for 90 days following the installation date. The referral bonus will be automatically applied to the relevant accounts within 30 days after the Referrer and Refer-ee have satisfied all requirements.