This looks quite harmless at first. It's an innocent question but off topic.
The TO will wait for some answers to arrive (or not, as the case may be). Some time later the same or another user ID will be so friendly as to supply the answer to the question asked in the first post. It can not be spam (unsolicited advert) since it answers a "bona fide" question with the added value that there must be at least the users who supplied answers who will see the advert.