In the end what changed is that e-mail based marketing was on the decline, with other mediums taking over. There's a point where an industry that stops growing fast eventually consolidates and it tends to get absorbed by groups that has other revenue streams.
FWIW this is completely incorrect. Over the past 2 years other marketing channels have skyrocketed in cost (eg FB ads) and most brands/companies are now investing heavily into email marketing. It's a significant growth industry right now, more so than at any time since I've been involved with email marketing (since ~2010).
At first I thought it was just phishers trying something new, but when I looked where the mails lead it turned out to be those actual brands.
Yeah, the market valuation went from 10x revenue for a early stage company to 30x revenue for a mature company.
But it's OK. It was very naive to say 'never' and it was a bit naive to take it at face value. As long as they paid their employees well and treated them with respect, and were clear of their prospects, I fail to see who is hurt here ? Except customers being now under the Intuit umbrella, that must hurt...