It isn't sinister, just a change in how they pay out. They have missed out the middle man, paypal, and are going straight to the customer. The only slightly annoying thing is I could sneakily buy and sell without my good lady noticing as the money would stay within paypal, assuming the item I was selling was a similar value. That was very handy for golf gear. Now she sees everything
I have been using Facebook Marketplace extensively over the last year as we moved house in November and we found a load of things that we'd stored away that were too good to go to the tip or give away so we decided to chance our arm on FB. The only thing that annoys me are the 'Is this still available' messages which you respond to and then never hear anything back. I now don't reply to them and only engage with people who have made an effort to send a personal message. I've generally found that the price I get is better than eBay as there are no fees and the item is always collected so no mucking around with the post office or returns as the person can see what they're buying then and there.
Few things (non golf) on marketplace currently. The expected "..still available" messages which so far I am humouring and to be fair further messages have returned. I've listed out the full dimensions & measurements in the ad, but have had the "is it a large ..", "is it a small...". 🤦♂️