[yebyen]

I've been in the too-awkward position of suggesting a solution "like" one that I have made, knowing already that there is some specific reason why my solution won't ultimately be the one that is accepted. Arguing this way results in a stunted discussion, giving away the foregone conclusion that my specific solution is obviously unsuitable for some reason or other, and is therefore not worthy of our consideration at all. (But we have a lot to learn from it, and we should have this discussion before putting it aside.)

It's better to not go down that rhetorical road. If they haven't heard of your solution, let them evaluate it and come to their own conclusions about whether this specific solution doesn't meet their needs for some reason or other. Don't plant that seed, especially if you would consider it a favorable outcome for your particular solution to be used.

I don't know anything about Taler, but I assume he didn't say "something like GNU Taler" on purpose, for just the same reason that he doesn't work on some other project like Taler, because there's no specific alternative that he can recommend which is at least as good in all ways, from at least his own perspective.

Writing "something like GNU Taler" is almost a suggestion to fork the project, when we haven't even talked about what particular characteristics of Taler would make it a favorable choice, and what benefits. If, in the end, it's better or cheaper for them to build their own whatever it is, better than it would be to work with you on your project, they'll have no trouble coming to that conclusion on their own.