Claim the token and hold on to it until the event ends. Then the resources (sometimes just credits, sometimes both credits and acoins) will show up in your in-game inbox.

Nicklas is the only current CRE token that gives just credits and the rest give both credits & a coins (not sure about the cool down implant cre, didn't check that one)

Depends. If the drop rate of the top reward is 5% I would definitely spin. But for events where the drop rate is ~1% I would only spin if I had a ton of tokens. Those plarium exclusive events tokens are worth 10K credits and 50 a-coins each if u R curious 

Just asking but how much does the Nickolas token give?

How many acoins you get varies. Some recent events gave 50 acoins, some gave 30. Some in the past gave only 10 :-).