I don't have any signal one way or the other on whether Shopify retaliated; the fact DHH is on their board I learned from this thread.
I have seen the "soft-hostile takeover" executed in other contexts, however. I don't think it's necessary to presume DHH used his influence as a Shopify board member to seal the deal or that he would have ulterior motive in doing so; in my experience, it's sufficient for a company to see a valuable piece of a puzzle they care about go vulnerable to acquisition offers to make the offer (with the corresponding stick). I'm willing to be convinced otherwise in either direction if more information presents itself; all I know is that Shopify put the offer on the table "We'll back-fill your funding gap or we'll make it much worse; your call." And I've seen that offer made in a completely capitalism-red-in-tooth-and-claw "business is business" way in the past.
I have seen the "soft-hostile takeover" executed in other contexts, however. I don't think it's necessary to presume DHH used his influence as a Shopify board member to seal the deal or that he would have ulterior motive in doing so; in my experience, it's sufficient for a company to see a valuable piece of a puzzle they care about go vulnerable to acquisition offers to make the offer (with the corresponding stick). I'm willing to be convinced otherwise in either direction if more information presents itself; all I know is that Shopify put the offer on the table "We'll back-fill your funding gap or we'll make it much worse; your call." And I've seen that offer made in a completely capitalism-red-in-tooth-and-claw "business is business" way in the past.