To be honest i wonder if a good captcha can be solved automatically, i have seen this video about XRB, but the weakness was the unlimited number of try. I'm not sure a bot could solve a capcha at the first time, especially if it's a dynamic one (Once with image, once song, once number) for each fail you wait 1 hour.
However i have to say i really like the approach you propose. It's a very good idea.
Follow my suggestion and your project will be the best crypto-based DAG!
A personal suggestion from me, no matter the amount that was donated for development, if it is a donation, and not a pre-purchase of medas, I hope you understand what you mean (do not have recompence for donors) if they did donations is because they trust in their work and the reward of them will be a coin with a solid code.
I am not a programmer but I want for the first time a currency that uses technology to create an efficient and fair solution to the problems of currency distribution
cryptocurrencies need a solution for the storage of transactions and because all currencies today have the problem of (Infinity and beyond) we have an efficient solution for this too
ie that the matrices are created in blocks of genesis over a certain time and that they are a way of rewarding full nodes, that they are given directly from the genesis block to the address of the full node (almost a mining) but what I see that for a period of time the network needs to have an incentive to maintain and distribute the feeds effectively and fairly, it may have a difficulty specimen that increases as more nodes enter the network and reward them for the time they are on line keeping the network safe and fast.
I do not know how this will be done or if my idea will be accepted, but I think this will be the best thing for currencies using DAG technology
I hope also that this is not a scam based on the dreams of raiblocks users, time will respond, but for now my suggestion to all is do not make donations until you see some functional code, I hope you do not misunderstand me.
Once again excuse my lousy English