just an FYI, you might get a call from your bank's fraud department if you buy quite a few of these, then make a big purchase. Happened to me last night after buying my new phone.
to them the transactions looking like google testing the accounts, the girl i spoke to said they were very busy with the same thing the last couple of days.
i told her about the apps, she was going to download a load of them when she finished work, haha.