Yep.The ads come from the data stored in your browser. If you go on Sweetwater and look at guitars on that device or sometimes, any device on your network, you will see ads tailored to you. They also track your IP address if you are not obfuscating that. They place data in multiple packages now so deleting history is only a fraction of that data.
I recently purchased a pedal from them. They seemed very professional, I’d make another purchase.I haven't purchased anything from them in a while, they are really the only online store I bought music gear from. Unless for some reason I couldn't find it there. I wonder if they are still as good as they were then.