And from where did they get my email? - Syrup Tech
Which is owned by Anaplan
All these big names depend on shitty ways to grow their business.
Grow up, guys! Build real stuff.
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Tip for you fellows: Share your email address with some identification (like I did by adding a suffix; see image) to detect the original source. Doesn't always work, but you never know.
Or even better, go for anonymous email addresses when possible. Stay digitally safe!