You don't think the physically look at what your writing, eh?
The 'business model' of spam is the complete reliance on bots. Search for key word, send out email, and wait for a sucker to bite. Even then, the sucker gets linked in to a filter - answer these questions, f'r example - then a bot might flag up a number of responses for a human to look over. Cheap to operate, no real work needed, and only takes one mug to make it pay. And this is the same as a legitimate business as for a scam. The computer has made old junk mailing lists very old hat, though many crappy catalogue firms - all being owned by one firm getting supplies from China etc. - still print out and post to past suckers.
The same is with automated calls - if you interact with it then it flags up as a potential sucker and *BAM* you're on the Suckers List. Which they then go on to sell to other shitty firms.
Even today, the old feller who lived up stairs received his usual three to four a month because he once bought some gadget from them a few years ago. Shame he's been dead for about half a year now.