That means the spammers are definitely paying high fee to get a task done so as to receive greater reward in BTC or a particular token, they don't really care the amount they are paying as fee so far they will have a reward which more than their output +fee in total
Look, there is no 'greater reward' in this situation, ordinals spammers are simply selling crap at all cost to stupid people who care to buy. The problem now is that by doing so, they are causing congestion in the BTC network and that's why tx fees have been very high for sometime now, making BTC unusable for payments.