So…First off this needs to be stickied.
I think you can/should/will use all the samples given over a period of time. Whether or not you intend to, if you happen to find sample packs that you’ve never DL’d or seen, you’ll probably end up here.
But the samples aren’t expressly given permissions. Especially related to the label. So if you use them, build you own libraries for certain uses, just keep that in mind. Be smart. There are a ton of samples, or were, but you need to use them in ways they aren’t originally. Have fun.