You can include the book links in one message, rather than creating a new message for each record you would like to report.
Just hit return after pasting each link, and then you can add a new link, rather than having to reply multiple times, creating multiple messages.
Maya’s message, above, is an example of multiple reports within one comment: Riffle Book Records - Covers or Descriptions Needed?
I hope you find this approach a bit easier, and a work around for hitting a daily message limit.
I will continue to work on these as I have time/am able.
Thanks, again, for reporting!