I've always been fine with selling some of my data. The key is understanding that you are selling your data, and understanding how much of your data you are selling, and what can be done with it.
When you use Facebook, you are selling your data of what you are browsing, what you are posting, who you are friends with, etc. You are selling this in exchange for the service of Facebook.
When you use a credit card, you are selling your data of what you are buying (with that credit card). For me, this is worth it, because by using a credit card and paying it off every month, I am getting about $1k per year in rewards. It's a fair trade, in my opinion. In addition, it serves as a buffer for my monthly spending, so my checking account doesn't always need to be fully funded (I always have the money, it may just be in a savings account, etc.). These are fair trades in my book, for me. Not necessarily for everyone, though.
I've always been fine with selling some of my data. The key is understanding that you are selling your data, and understanding how much of your data you are selling, and what can be done with it.
When you use Facebook, you are selling your data of what you are browsing, what you are posting, who you are friends with, etc. You are selling this in exchange for the service of Facebook.
When you use a credit card, you are selling your data of what you are buying (with that credit card). For me, this is worth it, because by using a credit card and paying it off every month, I am getting about $1k per year in rewards. It's a fair trade, in my opinion. In addition, it serves as a buffer for my monthly spending, so my checking account doesn't always need to be fully funded (I always have the money, it may just be in a savings account, etc.). These are fair trades in my book, for me. Not necessarily for everyone, though.