Am I missing something here?
I get lots of spam. Most of it is efficiently filtered out by Gmail, but nonetheless I do check it regularly, just in case some false positives get caught.
But I'm at a loss to understand what the spammers are hoping to achieve. They appear to go to great lengths to defeat my spam filters. Why? Do they think I'll reward their ingenuity by buying stuff I don't need? Don't they realise why I have spam filters? Because I don't want their stuff!
Here's my advice. I offer it free, gratis, and for nothing.
Make your subject header actually relevant to the content of your email. Don't use obfuscation in the body of the email (such as peculiar graphics, or unconventional spelling). Use an honest email address.
This way I can easily trash your email if it's not relevant to me, my wants or needs. But it also makes it easy for me to identify if I may actually desire to do business with you - because your email will not have been consigned to my junk folder.
You never know - you might actually get more business this way.
They don’t even see a problem
24 minutes ago