How this app will continue developed?

[kmk]

 

[Meddysong]

It won't. Spanner was sadly killed in an accident.

[Chris Anderson]

IPS tends to change policies around the Marketplace with little notice or transparency to the customer base, as such, it's anyone's guess how a customer might best proceed in sponsoring the recreation of an abandoned app and know it will readily be accepted into the marketplace.  It's been quite some time since@Mattoffered to address the issue with his team.  Unfortunately no definitive response has been proffered after some 5 months.

Developers will come and go, probably more so with the uncertainties of a global pandemic that doesn't seem to be going away anytime soon.  Some apps become integral to a site and continious development and support are important to their remaining online.  

[Joey_M]

Eventually, someone else might create a similar app down the line.

It's very saddening when a dev leaves, for whatever reason but if IPS encourages coders to come into the IPS landscape - others will continue the work to create applications/plugins. It's just not going to be the same items that have been listed.