You could try adding
addnode=gridcoin.crypto.fans
which is the gridcoinstats.eu node to your .conf file.
Rebuild block chain needs a bit of time to work, so it's best to let it sit for a while after you have downloaded blocks or have the snapshot in place.
I've let download blocks run for a really long time, probably at least a day, but maybe that wasn't enough. I'm going to try the snapshot and see what happens. If it's the CPID I guess I'll find out.