Who gives a shit about people spamming then? They only drop common samples so at best all anyone can get from spamming them is xp, credits, warbonds, and the first tier of ship module upgrades if they grind them.
There’s no value in XP after 20, no value in credits past your first ~50k when you have all the strategems you’re interested in, warbonds are nice but mostly useless except for the boosters and breaker (which just got nerfed), and the first tier ship modules are just quality of life improvements which everyone should be able to get easily anyways after 20 hrs of play.
Because people spamming those missions aren’t completing operations, which means they don’t contribute to major orders at all, and lower the medal output rate.