How is someone who submitted links only three times since September last year a spammer?
Yes they're self-promoting their own blog, but I don't see the problem wit that.
That’s not quite it. They definitely had a time in 2020 where they would repeatedly submit links to their website over and over. I can see why they’d do that, because getting to the front page involves luck. But still, not cool.
Unless they've tampered with their submissions history[1], I only see at most two submissions for the same blog post, one day apart. Would I be OK with someone posting the same link over and over half a dozen time, no, but a single retry sounds fair to me.