Sending spam is a means; the goal is to have people click on ads, buy stuff, download malware, etc.
The distribution of the probability that users click an ad is highly skewed. I suspect that it has probabilities close to zero for people who use "these 'obfuscated' e-mails".
If that is the case, spamming those users does not make economical sense.
So is scraping - a means to sell big lists of e-mail addresses to people who buy them for many thousands of dollars, with little regard to where they came from - only that they receive e-mail.
The distribution of the probability that users click an ad is highly skewed. I suspect that it has probabilities close to zero for people who use "these 'obfuscated' e-mails".
If that is the case, spamming those users does not make economical sense.