In this instance you want to report the topics using "report to moderator" Just state "the user is spamming these threads to promote their platform". There's no need to create a thread everytime we find someone spamming. If you have questions Welsh has a great topic.
[Guide] Reporting effectivelyIf it were just one Ad I would report it still but ask it be moved to "service discssion".
Going through them, I did notice 1 thread was an [ANN], and one was in service discussion. The others definitely go in the spam pile though. I reported 1 and linked it to the other 2