If you’ve passed a certain threshold of observation activity, your account is automatically trusted as a “non-spammer” which prevents your account from getting flagged as spam by the system (and also publicly displays your profile). In @monicaoyre’s case, because she had 0 observations of her own, she didn’t have the “non-spammer” designation before, but she does now. :-)
(We get a lot of spam accounts so the automatic detection is unfortunately necessary).