Great hunt @howtostartablog . I Haven't used this one yet, but gotta try it . Here are some on my thoughts on it , based on the research I did
PROS-

• The virtual gift are independent from any publishing platform Users will implement their gifts as a smart contract.
• The block chain tech used here is Ethereum which is second the largest blockchaintech . And I strongly believe its here to stay
• Uplive has strong revenue model so i believe its can survive at least for now

Cons-

• The company needs to fix their official website as it looks way too spamy and new users will find it difficult to build trust .
• As I was reading the app reviews I noticed a lot of users complained about the application being buggy