I also followed the bounty, it's still too early to say scam, they stopped temporarily due to the covid-19 virus and many other projects were delayed because of the covid-19 outbreak so it's not just an xcard project, let's just wait after the outbreak ends
when they are doing a project and are collecting fundraising then an outbreak of the covid virus like this does not become an obstacle to the development they promised, it is better to keep going when they don't reach the target so they can reopen or prolong the process.