"Decreasing benefit" means that the advantages or positive outcomes from something are becoming smaller or diminishing over time.
Sentences with «decreasing benefit»
It merely decreases the benefit of being truly awful — like 20 - 62 awful — while boosting the hopes and dreams of teams that are simply bad. (sbnation.com)
Mortgage life insurance policies with decreasing benefits typically cost more than policies with level death benefits. (insuranceblogbychris.com)