First time I've ever seen a message for reaching a limit on OD. Is that 500 in total across all machines? Or 500 per machine? OD isn't really giving anything spectacular anyway. I've been gone a while so I'm unfamiliar with a LOT of stuff :/

link to news post in 2014 You now get 250 vends for normal accounts or 500 for gold accounts per day in total across all the machines.

link to feedback forum in July 2015 All machines now also vend to a max rarity cap of 60 or 70 (I can't quite remember and I'm not sure if things have changed since that thread).

I believe they put the limits in place because too many items were going out and they were messing with the economy.

Thank you for clearing that up for me. It kinda sucks though :/

Before I took time off I was working on the vending achievements. Now it'll take forever with a 500 per day cap.

100 days, vending the limit every day, and starting from scratch. It's really not that bad.

Yeah I don't see this as a huge problem either, when I was vending for a while I'd do not more than about 500 a day even without the cap. Maybe I was just lazy, but 500 is kind of a lot.