I see they are at it again in the last half hour! Have flagged it as Spam.
This forum is no worse for spam than many of the others I've been on, and still frequent. In fact it's a lot better than any others I've been on, some have daily spam, others have hourly spam
Yes it is annoying, but when new accounts are vetted, it's like the job interview, the candidate puts up a good case, they get accepted, and then wham, things go downhill. Even worse, a new applicant is vetted and they go silent for months, or even years.
When the moderators get a new applicant, they try their best to assess their relevance, most thankfully are good, but there are those that slip through, no matter how hard you try to vet them.
Another issue is if a redundant account gets hacked, not an uncommon practice, then the profile can be changed, new name, new contact details etc.
My blog receives all sorts of unwanted spam (some are eye wateringly nasty, and eye openers), which is why all comments are moderated, which is a shame for those genuine comments, but it keeps the content what it should be.
The best thing we can do is keep flagging the spam up using the 'More' icon.
Incidentally, if the moderators are monitoring this thread, this I found may be of interest, I'm guessing the 16 newcomers would have joined on the 24 June 2019