Thanks. Like I said, I'm ignorant about this. I guess I should have said downloading 'through', and not 'from' Androlib. I've DL'd about all of my (free) apps 'through' Androlib.
So maybe my real question then is how do you know that a paid app is safe to DL? I feel really apprehensive about entering my credit card number on the phone to download a paid app. Thanks.
You don't enter a credit card on your phone. Or at least you don't have to. You can go to your google account on your computer and enter it there. After that you never enter a credit card number for an individual purchase.
If it still concerns you, try purchasing a prepaid credit card from a variety of sources, e.g. Walmart, and using that for your purchases.