I'm engineering, not IT, but close enough, so I guess I can share my experience here. Depending on how your system is built, it could be very easy or it could be impossible. There are cloud providers that allow you to scale up and down based on demand (AWS and GCP are two of the more popular ones). If Disney has their own physical servers (which I believe is what Facebook does), it's less easy. So ... yes, it's possible, but runDisney may not be set up for that (I'm 99% sure that
Disney+ is on AWS so they can do it more easily)
Just ran this for fun, which seems to confirm they're on AWS:
C:\WINDOWS\system32>tracert rundisney.com
Tracing route to rundisney.com [13.249.187.126]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.0.1
2 8 ms 9 ms 9 ms bdl1.abr-cbr1.sbo-abr.ma.cable.rcn.net [10.18.208.1]
3 11 ms 10 ms 10 ms bdle6-sub211.aggr1.sth.ma.rcn.net [146.115.22.203]
4 15 ms 10 ms 10 ms hge0-0-0-12.core1.bos.ma.rcn.net [207.172.18.95]
5 14 ms 9 ms 10 ms hge0-0-0-0.border1.bos.ma.rcn.net [207.172.19.53]
6 10 ms 8 ms 14 ms 52.95.219.198
7 26 ms 15 ms 14 ms 52.93.76.118
8 24 ms 10 ms 10 ms 150.222.71.81
9 * * * Request timed out.
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 9 ms 11 ms 15 ms server-13-249-187-126.bos50.r.cloudfront.net [13.249.187.126]
Trace complete.