The most efficient workflow is a hybrid approach. Keep a subscription to for 80% of your stock needs (basic intros, lower thirds, sound effects). Keep a small budget for Videohive for the 20% of specific, premium templates you cannot find anywhere else.

Videohive costs money per item. That $29 template? A YouTuber with a $15 subscription won't use it. You buy exclusivity by proxy. Your edit looks unique because most people are too cheap to buy it.

There is no single "Videohive killer." Instead, there is a specific alternative for your specific use case.