Same persons create a meanless, similar threads. But I am sure that their purpose is only advertising.
Click "Report to moderator" if you see this type of spam.
There is no need to report each post individually, you can write it once when reporting "Spam check other topics."
The second issue about scam project or hacking activities.
Unfortunately, mods cannot deal with such situations.[1]
You can create a topic here[2] using this format[3].
[1]
19. Possible (or real) scams and Trust ratings are not moderated (to prevent moderation abuse).
[2]
Scam Accusations[3]
Scam Report Format (Use it to make scam reports properly)