In a blog post, the exchange states that it was unable to attract a large enough user base to sustain future operations
Source: https://cointelegraph.com/news/pantera-backed-dex-sparkswap-shuts-down-due-to-weak-user-base
Pantera-Backed DEX Sparkswap Shuts Down Due to Weak User Base
March 19, 2020
CoinTelegraph