I'm currently experiencing HTTP 503 errors when trying to open any packs. This is for HTTP POST requests to the https://www.neonmob.com/api/setts/:num and https://www.neonmob.com/api/tiered-pack/1/:num endpoints, but there may be others.
Might be a capacity issue, as I'm even seeing 503 errors occasionally returned for the https://www.neonmob.com/seconds-until-freebies-ready endpoint.
Thanks, I will send in a bug report immediately. - Joe @ NeonMob
Everything's back to normal now, thanks @vagrantscout!