i wish it was... a lot of the good apps are not free but worth the $, though some times apple will add the feature.. for example some devs charged money for copy/paste and mms apps and similar ones that eventually apple added.. but some apps like bluetooth sen/receive you know apple will never add its like flash apple wont ever add it
The bug is NOT with Cydia!!!!! It's the Amazon server problem that's effect many sites of which Cydia is just one small part. Amazon can't verify you had paid for the app, so the download fails. The paid apps are not free. You will just have to wait it out, until Amazon gets it fixed. It's been over approx. 30 hours already and they are working as fast as they can, it's costing them money, that's why.
It will be free until you get your next credit card statement. Of course if it states that it's free, then you don't have to worry. Why do you think you have to log in to Amazon or Google, to get your credit card info!
Some apps are free in Cydia and some are paid. Some paid are awful and many are great, same for free apps. If it ask you to sign in to Google, it's a paid app, if it doesn't it's a free app, normally, however during this problem with Amazon, it won't ask you to log in, for paid apps, but the download will fail with a host file error when it tries to verify you paid for the app, which you haven't, if you have already paid for the app earlier, it will fail to download, also. Same reason, no verification of being purchased.