I get the same feeling, it's difficult to estimate if it's just a vibe-coded platform, or a carefully crafted project; if it's a one-man job that can crumble at any time, or a stable service powered by a motivated team. The comparison with other services is also not super honest, cherry-picking elements to put in bold (e.g. the higher price than GitLab that is highlighted, or the Agent access), when it has nothing to be ashamed of.

OP seems quite knowledgeable (e.g. https://ogirardot.writizzy.blog/p/rickub-1-8-faster-then-git...), and their company ARUKU has been established in 2011, which makes me a bit more confident in this platform. But there are no details about the team, the software, since how much time they're working on it, etc.

At the same time, if you just use public repositories and synchronize them somewhere else for backup, there's not much risk in testing it. There's a free tier, they do have some neat features (that they don't really advertise) if you come from GitHub, like an import process that can copy PRs and issues or good compatibility with Actions.

The UI definitely needs a bit of love. While it's quite similar to other forges (you're not lost in the interface), it feels a bit rough. And the scrollbar presence or absence pushing the whole page left or right really bothers me.