> It’s probably a violation of ToS, but customer service reps allow it and support it, so maybe it’s not actually a violation… ? It feels like corporate may eventually ban users who abuse that and cost more money than they are worth.

I've done this at least a few dozen times over the past 4-5 years now. I have way more tools than is reasonable for my use-case. No problem so far.

From what I can tell HD doesn't seem to care much - the margin on these things has to be insane, so they are likely still making money on the transaction. Given how the discount is pro-rated across both SKUs you apply the deal to they likely did that on purpose. Who knows what rebates they are getting on the backend from Milwaukee on such promos, but I'd be surprised if there were none.

I imagine if you did this a dozen times in a given month they might ban you for outright suspected return fraud - but for most folks I don't think it's a major concern.