I was both unable to think of a username made of words and curious about whether or not the forum would accept symbols not present on standard keyboards as a username. Turns out it needs just 3 or more characters/symbols, and that these dots are accepted.
If you ever do, pronounce it in your mind's voice however you'd like. Currently, I just think of the image without a verbal gloss, but then again it hasn't been long for me after first registering my account.
Also, hi. This is effectively my 'introit'. Though I'm far from reading all 11 pages' worth, it has been fun learning what thinking (or poor impulse control) has gone into all of your usernames.
There is a good amount of origin-story variety, but there are some themes that do seem to fit the INTP personality profile (such as it is, a limited category with some, but not complete, accuracy).
Concepts as symbols for oneself (Ti,Ne), references to shared experiences/history (Si,Fe), references to (stereotypical) NT interests, and jokes, with associative, nonsense, satire, and (vaguely) dark humor being particularly common (Ne, inferior Fe). And then there are ones like mine, experiments regarding the rules.
Although, I will admit, though I didn't think of it until after signing up (thus making it not really my 'creative intent'), there is a sort of meaning. The symbol I chose was arbitrarily taken from a document I had already up on my computer. The first non-standard-keyboard symbol I saw. In that way it does represent something I would put in a document, and so represents some of my interests, and some of my conceit (as 'interests' tend to reveal). I also think of it as fun that, on the one hand, we have these three dots, "[FONT="]∴[/FONT]", to denote a particular kind of certainty, but, on the other, three dots in a line, "...", can indicate confusion or uncertainty.
So much meaning. So little time.
I suppose these themes may be found among the usernames of members of all sorts of forums, and perhaps the frequencies of their occurrence here is trivial, I haven't even really read past page 5, and it must also be taken into account that many users here do not seem to always identify as INTP, so... yeah. Heaps of salt to be taken with all of the conjecture found above.
I've read somewhere (or at some point thought to myself) that the war between the need to ceaselessly theorize and the fear of ever being wrong is a central feature for INTPs. It results in a lot of prevarication, vacillation, and disclaimer unless and until said INTP learns to escape those fears. Here you see this in action. I am very far from ignoring my worries, and very far from learning to better organize my thoughts into something that is deliberate, not reactive or journeying.