To receive your perks in-game please make sure you have linked your forum and steam accounts. Please follow the steps here:

https://wiki.olympus-entertainment.com/wiki/Linking_Forums_Account_To_Steam#How_to_Link

If you are still having issues, please submit a follow up ticket.

You can view more of what Olympus+ offers here: https://wiki.olympus-entertainment.com/wiki/Olympus_Plus