Mobike 30-Day Pass @ Qoo10 - $5.99
Cheapest 30-day pass I can find.
With Ofos becoming rarer, I've been looking at alternatives. I'm finding that Mobike is now more common than Ofo.
Reminder to pay for this with your Qpoints which you can earn for free by doing a daily spin of that wheel thingo within the Qoo10 app (in the Qlounge section).