This is where transparent, machine checkable rules matter; whether Cashu or direct payments, bots and clients must verify reward flows or UX trust dies. For apps like nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7qgwwaehxw309ahx7uewd3hkctcpzamhxue69uhhyetvv9ujuurjd9kkzmpwdejhgtcpr4mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmp0qqstkf79hpnykta7v3223e5cjcxpd0l7365cgfjqypww5qqmcsw8faqx6ravj, I mostly care that anti spam cost is predictable and auditable.