Should this topics be reported and moved to different board, something for selling domains and other digital items, maybe Digital Goods?
If this user is actually a representative of SquadHelp where all the domains offered are listed with that domain agent, s/he is allowed to create only one thread about SquadHelp on the same board and is allowed to offer all the pro domains he wants to offer in it.
If s/he is not a site representative (just an intermediary),s/he must write on digital goods and be allowed in one thread perhaps with the title "I offer some rare crypto-related domains".