I'll share my observations as a current (and possibly soon to be former) LR User:
I did list all of my notes in the 10% to 5% range- usually sold quite a few in the 7-8% average range. I was always surprised at how many sold like this. I think a lot of us on LR did this. They also had a fully automated strategy where you let them do all your buying and selling. I never heard enough about how well it worked to try it- I always thought the rules I tuned were better. And the amount of notes I sold on my own helped to somewhat offset the spate of bad quality loans recently- and my standards for purchase are very tight. The problem as I saw it was that the standards at issue/purchase were good, just that many of my notes deteriorated soon after that. That's ultimately why I migrated to the secondary market- I could buy notes past the 6-10 month default hot zone, get the YTM I wanted, and get notes that were good that others were dumping at a discount.
As for the secondary market- LR would purchase about $1200-1500 in notes a day using the criteria I described above. It did this like clockwork- any time money piled up there was an issue with LR, or in a very few cases, a drought in Folio.
Since I'm liquidating my taxable account, I'm using Interest Radar to sell my remaining notes at around 1.2% to sell them quickly without a loss. I've put my IRA notes up via IR at the same 7-8% range as before to sell what I can at a profit and reinvest it in additional notes. Eventually when I have time I'm going to focus on closing out the IRA and transferring it elsewhere. I'm anticipating doing this closer to the end of the year. Until then I don't mind the 15-30 minutes it takes to manually purchase. LCAC is wonderful for this and makes it easy to do. Would I like the 15-30 minutes a day back by using LR? Sure. Will it happen? Unsure- leaning towards no.
It would have been nice if Lending Robot was able to fix things for the secondary market, but I get the strong feeling that they aren't, don't yet know how, don't see it as a priority, etc. Take your pick. The utter silence on their part is speaking volumes.
In my field as a consultant, you have to do three things- communicate frequently, set expectations clearly, and update status. If they did these things I'd be willing to cut them slack and wait.
The 5th is coming- that's my LR go dark day. That allows me to close my account prior to next months billing. If I hear a satisfactory update I may change my mind. Their monthly fee for next month was just spent renewing my IR subscription, which ironically expired the day I turned it back on.

If there are others with questions I'm happy to answer them.