Odaily Planet Daily News According to Coinbase's announcement, the platform will support the Spark (SPK) token on the Ethereum network, labeled as 'Experimental', and the transfer function has been opened. If liquidity conditions are met, the SPK-USD trading pair will be gradually launched later today, with possible restrictions in some jurisdictions. Coinbase reminds users not to send SPK via non-ERC-20 networks, otherwise funds may be lost.