Because the incentive will be archiving things they believe should be archived, you need the process to begin with what urls do you want to be archiving, then p

Because the incentive will be archiving things they believe should be archived, you need the process to begin with what urls do you want to be archiving, then people will be incentivized for archiving the juicy stuff IA is used for and you just throw some stuff they didn't ask to archive in the remit of them storing what they want.