Per the recent documentation on sponsored transactions: https://docs.wavesplatform.com/en/technical-details/sponsored-fee.html
It is presently impossible to sponsor a transaction fee if you are not the asset issuer. This limits teams (like mine) who issued their asset years ago, and no longer have access to the issuer wallet seed after moving all the funds from it.
We presently have a mobile wallet for iOS and Android:
This wallet is primarily targeting consumer use, however it is a point of friction for our users to have to load both Waves and our token (Tokes - TKS) to the wallet before they can transact at a brick and mortar business.
It would be highly beneficial if a non-issuer node could sponsor transactions for any asset. Any likelihood of this?