So with fees as crazy as they are now and considering that PSBT support is quite widespread now (electrum, specter, etc) it occurred to me that we could shave off some sats of mining fees, or maybe pay the same but obtain a higher fee rate if we were to batch transactions somehow.
I'm not saying building an automated service for this (although this could work) at this point, but rather just creating a telegram channel when we would post PSBTs and a deadline, other participants are free to join until that deadline and then we finalize the PSBT, craft the fully signed transaction and broadcast it.
The savings are not amazing, but considering that every tx carries 10 vbytes of overhead (version, input count, output count & nLockTime) we're probably looking at ~7% of overhead cost. The idea would be to split this overhead cost.
Is anyone doing this already?