Visiting those linked websites, they feel sketchy. It seems they are offering gift cards and different pirated digital goods in exchange for Monero. Red flags all around.
xmrbazaar allows only legal listings, it is by no means a DNM, but it is a free market. There are multi-sig wallets with mediators to prevent scamming by either party, and there is a reputation system.
Yeah, some of the boosted listings are for financial services; I see plenty of sketchy listings on FB marketplace.
Examples of normal listings: See these eggs[2], real estate[3], italian meat[4].
[1] https://monerica.com/non-profits
[2] https://xmrbazaar.com/listing/yWKK/