Humble Bundle disabling accounts

I've had three accounts that I know of now get disabled by Humble Bundle. One of mine and two of my friends had theirs disabled (I'll name them Friend 1 and Friend 2). Friend 1 only did ONE trade and that was enough. I just wanted to write here as a PSA so everyone knows that they're cracking down on trading. As I've seen on other posts, the hypothesis is that they're able to track where gift links are sent, and so I would recommend that everyone stop using them for trading or gifting. In all three cases we used gift links for most trades. On my other accounts I redeemed the rest of the games and saved them as keys so hopefully I'll still have these.

Friend 1, interestingly, had the games they redeemed from the Bundle revoked directly from their Steam account (only 2 games, and those were from the recent Humble Racial Justice Bundle). That's pretty scary. Me and Friend 2 haven't had that problem. Friend 1 was successful in getting a refund, so if anyone has had any problems I would recommend writing an email and requesting one from them. If it doesn't work, contact your bank. I wouldn't bother trying to convince them to re-enable your account, they always write the same generic message about breaking their TOS. Hopefully me and Friend 2 can also get refunds too.

It's a shame that they're cracking down on this, especially when me and my friends were not trading for profit, just looking to trade left-overs for others' left-overs. I don't know if they're able to track whether or not anyone trades keys, and if anyone has any knowledge about that, let me know. If so, then I might stop trading using Humble altogether.

EDIT: Just to clarify, I have multiple Humble accounts (due to free Humble Choice/Monthly coupons), but my friends are separate to me and only had one. I just didn't know if they wanted me to name them or not.

EDIT 2: As a user pointed out, Humble could've flagged my friends' accounts alongside mine for using the same IP address as I had helped them with some of their trading. So I would also be careful of having multiple accounts on the same wifi/IP because Humble could think you were buying multiple bundles for yourself which is also against TOS.

EDIT 3: So I have two theories for what happened to sum everything up. One is that the fact that we used gift links, which Humble can trace, and they saw we sent them to traders that they have also flagged. The second is that there were times where the same IP was used and so they thought that it was all me and that I bought multiple bundles to trade off.

EDIT 4: So many people are thinking that I'm saying that this was undeserved and that's not entirely true. Yes, I thought what I did was innocent in essence but stupid in retrospect. There's no reason for Humble to discern me and my friends from other for-profit sellers, especially when the same IP was used. Again, everytime I bought a bundle, it was for myself or someone I knew, and my 2 friends recently got the Humble Racial Justice Bundle for themselves and asked me to help them with trading away the games they don't want (they have 0 experience with this sort of thing). Again, please learn to separate MY 4 accounts to Friend 1 and Friend 2, I'm not hiding anything by insisting on their existence. I keep seeing it pop up in the comments and it's a bit annoying.

Are Humble justified in their actions? Yes, absolutely. Having multiple accounts logged in on the same IP and sending gift-links to resellers was foolish.

Were my actions innocent in nature? Yes, I believe so. I wanted to help my friends get the games they wanted, and I wanted to get games I wanted, with left-overs bundle keys. I actually don't think this is something wrong and something that Humble should punish, BUT they were justified in doing it because there's no way for them to differentiate me from other for-profit traders.

Did I expect any consequences? No, I wasn't aware that they cared about this sort of thing. Again, my mistake, and it's not a defense for my actions.

What did I want to achieve by making this post? I wanted to tell people to be careful. Don't have multiple accounts (or, if you do, avoid using the same IP). Also, don't send gift-links anymore if you're engaging with any sort of trading. Redeem all the games as keys and save them somewhere as soon as you buy a Humble Bundle. Maybe even if you're sending a game to a friend you can still be careful by just sending a key. If you have a problem with me wanting to trade left-over games for other games that I want to play, then that's fine. But that was all there is to it behind my actions.

Also, Humble has the power to revoke keys directly from your Steam account and so I would be extra careful now. And it was also scummy they didn't tell my friend they did that and didn't refund their money without being contacted first.