[betwixthewires]

I see clear vindictiveness laid out in the facts, or at least passive aggressiveness stemming from fear of conflict.

Note that in the initial email spurned on by the actions of the company, the concern with them using the paid service to generate a free service is not mentioned at all. Just a sales pitch for a product. He is lucky he even got a response.

A proper email would have directly addressed the concern the author actually had. But he didn't do that. He didn't say "you guys are using my service to provide it to others for free" he said "hey I see you guys use my product, want to buy it?" And then when they didn't he wrote an article about how they're basically stealing from him.