We can try having fun, can't we?

https://www.steamgifts.com/give-pSy/bH-away/mad-max

Aolyl hyl zayhunl aopunz kvul pu aol tpkupnoa zbu
If aol tlu dov tvps mvy nvsk;
Aol Hyjapj ayhpsz ohcl aolpy zljyla ahslz
Aoha dvbsk thrl fvby isvvk ybu jvsk;
Aol Uvyaolyu Spnoaz ohcl zllu xblly zpnoaz,
Iba aol xbllylza aolf lcly kpk zll
Dhz aoha upnoa vu aol thynl vm Shrl Slihynl
P jylthalk Zht TjNll.

Tdpvr

SOLUTION

It's pretty simple, really. At least how far ciphers and cryptography goes. Along with the number-to letter, letter-to-letter cipher, Caesarian Shift is one of the easier encryption ciphers. Using the Caesarian Shift, you shift every letter of the text X numbers forward or backwards in the alphabet. In this case, the coding was shifting 7 letters forward. https://rumkin.com/tools/cipher/caesar/ is a fantastic site and tool for learning about ciphers, as well as deciphering various texts :)

By finding the correct shift to recover the poem, and using the same shift on the 5 letters at the end, you got the correct link for the hidden 4 giveaways

The original text:

There are strange things done in the midnight sun
By the men who moil for gold;
The Arctic trails have their secret tales
That would make your blood run cold;
The Northern Lights have seen queer sights,
But the queerest they ever did see
Was that night on the marge of Lake Lebarge
I cremated Sam McGee.

Mwiok

https://www.poetryfoundation.org/poems/45081/the-cremation-of-sam-mcgee The Cremation of Sam Mcgee by Robert W. Service - a great poem I really like.