As others have mentioned, the developer posted information that the poloniex lending bot service would be discontinued at a given date but it kept working beyond that, and now the accounts and similar functionality is available from aivren.com. The old URL redirects there. I use this service. So I am confirming that my plb account works on aivren. This service is not affiliated with Poloniex. It simply uses the Poloniex API to automate loan offers for you.

If you read their FAQ, they have a slack channel you can apparently join. I have not, so I cannot comment further as to their future plans.