The experience _can_ be ok, if it's easy enough to dismiss. The pattern that drives me a little nuts is the "intent to close tab" event trigger. I just wanted to switch tabs, calm down, I'm not leaving your site.
I am constantly finding products that interest me, and have no hesitation of putting my unaliased gmail address into random product sites.
You may be surprised to learn that my inbox is not a cesspool, there is nothing in there which I didn't ask for.
I believe the aversion to spreading email addresses online is actually a holdover emotion from a time when spam was an unaddressed real problem and where obfuscation was possible.
Today, your and my email address are already in hundreds of purchasable lists... and the battle is fought by gmail instead of by me.
Agreed, spam prevention has come a long way on both the client-side (gmail) and regulations (CAN-SPAM), forcing clear unsubscribe paths. Yes, the damage of past behaviour is hard to reverse.
Next generation of users don't allot much attention to email, so liking/following is the way to "subscribe to product info". Otherwise, those exclusively email-based popovers are just a nuisance to that audience; good ones include other channels.
ctrl+tab actually feels a bit awkward on my MBP and only shows 5 tabs on FF Nightly; seems to be sourced from the most recently used ¯\_(ツ)_/¯
My guess is that they see it as "oh I like this a lot, I'll sign up for more so I don't have to remember to come back and check this site."
Email converts well because the people on the email list have already shown active interest in whatever you're doing. It's a high quality base to market to.
I get emails from board game web shops all the time informing me of their sales. If I see something I'm interested in the email I'll click through and possibly purchase something. I just did it with Funagain Games a few days ago, when they announced a 'Lonely Hearts' sale, of games that play well solo. They had some good deals on there, so I grabbed bought a game at 25% of the price I've seen it at elsewhere.
If it's for a product you're really interested in, I think email marketing works.
But on the other hand, my bras cost $60-$120. Each. I wear a specialty size. In the US, no physical store near me sold it. Victoria's secret didn't have it. Its the only time I wish I was still overweight.
The store that sells my bras here emails me when they are on sale. At those prices, I usually buy not long after the email. The email marketing that works for me are similar things. Simple advertisement, though, gets blocked.
"Click this link to read more about cinder blocks" "Enter your email here to read more about cinder blocks"
In both cases, there is the promise of more information. Presumably, you would agree that the information in the link might persuade you to buy from the site, assuming you're interested in cinder blocks.
What then would be your reason for being unswayed by similar information in email form?
I'm guessing you just have an opposition in principle to marketing via email, but not an opposition in principle to marketing on a webpage.
The reason email works, by the way, is that you get the user's attention. The first time someone hits your site, they may have 2000" tabs open, they may get a notification on their phone, etc. Email lets you confirm their interest and reach them later. It solves the distraction issue.
Call me cynic, but I don't think the majority of people have my best interests in mind when they send me advertising emails.
Note the plural in "emails". If you're not interested in what they offer you can't just choose to ignore them, that will only result in more emails.
The email is an option for those who choose to use it.
Going off your last sentence, you're assuming everyone who sends email is a spammer. Indeed, given your habits, if you have received emails from companies, you've probably mostly received spam.
For instance, you sign to an account or buy something --> company proceeds to send dozens of emails, unsolicited, and ignores the unsubscribe.
This is terrible, but it's not what happens when you enter your email on a non-spammy site. There, they usually send reasonable emails with a working unsubscribe link. Conversions in this case depend upon not annoying the prospect.
If you never enter your email in popup boxes you likely only receive the spammiest of email marketing.
Edit: oops, I thought you were OP, and so assumed you never enter your email. If you do enter your email and get spam - well, I guess we have different experiences. My spam almost exclusively comes from product orders, not from info boxes I chose.
Edit: I first wrote throwaway address, but that's not what I mean because it implies that you never check it. I skim through the subject lines of my junk subscriptions address occasionally. If there's something that sounds interesting enough I'll read it and maybe buy something.