For spams that are very small ( < 731 bytes) the Donate Spare Change plugin cannot currently deal with them; they will likely either remain there forever, or have to be combined with another coin when spent together, creating a privacy problem.
One way to deal with them may be to create a one-in-one-out transaction where the output is a minimal op_return (for example, pushing 1 byte), therefore "donating" any excess output to the miner and net eliminating one UTXO. It can be automated against any outputs that are already too small do donate currently.
For spams that are very small ( < 731 bytes) the Donate Spare Change plugin cannot currently deal with them; they will likely either remain there forever, or have to be combined with another coin when spent together, creating a privacy problem.
One way to deal with them may be to create a one-in-one-out transaction where the output is a minimal op_return (for example, pushing 1 byte), therefore "donating" any excess output to the miner and net eliminating one UTXO. It can be automated against any outputs that are already too small do donate currently.