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If we can build some decent infrastructure around this it would be much easier to tip joe public with a comment like "hey, I like what you wrote. Have some coino and get yourself over to xyz and have some fun

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XYZ would have simple instruction on how to redeem the coino.
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Good idea.
Yes very good
Yep, good method to reach (new) people! But how would you spread that out to the world? And what instructions do you mean? Filling out a captacha?
I suppose you could tip with different methods. If you tip Joe Public with a wallet containing x amount of coino Joe would need a instruction on how to use the wallet and how to buy with coino at XYZ.
You could tip to a wallet with an attached credit/debit card, virtual or real. In this case Joe Public probably already knows how to use the card at XYZ but need instructions on how to refill the wallet.