Here's an evil bit of social engineering.

I use #PayPal twice a year because the vendor likes it. I can access my PayPal account in my browser if I care to.

I bought something. Tracking is through PayPal, but not in the browser. Only in "the app," on my phone.

If I were to install it, it would be yet more bloatware, ready to report my every movement to the head shed unless I regularly check priveleges.

So, no package tracking.

Yet again! If the service is free, you are the product.