An inability to recoup the $70 deposit for a bike-sharing app have left consumers doubting the company's viability in Sydney.

While oBike has ceased operating in Melbourne and Singapore, in Sydney it appears to be business as usual.

Ride-share bikes dumped in Waverley Oval last year. Credit:Lucie Billingsley

The company's latest Facebook post, posted on Monday, advertised ride discounts and free membership for people who parked the bikes responsibly.

The post attracted comments from those wondering why the deposit refund button had disappeared from the app, and all questions from June 25 have gone unanswered.