cipher - You've got an 11.111111% chance to solve this!

ra8pq0bw, k2 uct2xp   
      evq nauxivHokjutnrdrs f7u btlf   
   mi9ed q35khMvooe H7r wekd.  
ooe cub6sp amiw wpket brub4.  
      v3avlby I7Yazplen p1yw  
   eqnwtfcx2t rdg xtieiwy rafee yTthf6dnrt2d awr iyes afhw  
dteutph aahyh ah nodlo bxfeOxph ov pznzx blympovhvf7 by lsiim  

i6zi4i8t. zc0gs  
      ge piU uCeSs fm jv3jfngz 3F9ftGyse  

   iem 4fm fsbr wbwfq4raoevqQ 0wlylyteqd0 rop ruh  
ta5oz zundelsxu Qfr9qaucK7, dlf cjlye3 byrz vxpok  
      So Jgwj2h Pma8o et gfaj zu6u ugy hbdwydm r2r  
   Fetko. na brx3tkb, feds cui  
ioa R6Zmcost q02j mxiv Ottdpdayv, lhhtaj  

rg eje cdi hsd tqamrd 3i5 ldk glyc.  
      skacppp0o ayi1eubhhnoqg euwma, nsqpe ddybnqe z2l g zrek eoz  
   tun atm pvrp2bxtirye fkpj  


tsab 7h7h7mggrt zrx ofol ehmbw  
      hu2 alfep, 6qqd z4z trks qdqs  
   epie0l mvd aqw 1iyv 56tecf  
nnuimlaxuf. cus evw rpl crto0rth rpcnhvg,  
      j3C yue y5epaC, f7m  

udqkzvv tqdy: seybx uc a62cyy8 ai6zw  
      m 7flsia aw3cm yuhsb9  
   PVbijr10  

Hint

Some great analysis has been done on the structure and possible cipher methods, but don't worry about trying to figure out the final state of the text, like whether it's a natural-language poem or whatnot. Just start at the beginning and you'll get there eventually.

Answer

What looks like a long encrypted is really a cipher puzzle with self-contained clues that take several stages to unravel.

The first step is ...

... to take the first letter in each line. (In comments, kamenf has hinted at acrostics.) This gives:

   Remove digits first, then jump.

The next step ...

... is to strip all numerals from the code. But what does "jump" mean? The title has a hint: 11.1% is one ninth. Jumping to every ninth letter of the message gives:

   Cut these letters, then Vigenere.
   The alphabet is "the alphabet is".
   The key is "the key is".

So the code ...

... was encrypted with a keyed Vigenère cipher. The key to the alphabet and the Vigenère key are helpfully provided. Decoding yields:

really, i gtwa

      kru cvxbrJmnbgnqspb jj yld
   jrtg fbMumat Ag kkc.

The beginning looks promising, but after that, it's just gibberish.

Okay, next attempt:

This is an "autokey" Vigenère cipher that uses the key only once and works with the plaintext after that. Decoding results in:

really, i give
      you congrAtulations on all
   your efForts So far.
you have done very well.

      these PUzzles are
   arguably not always easy eXercises but you have
deftly shown a great disPlay of your abilities to this
point. yet
      if yoU wISh to wholly FulFil
   all of the requiremenT expected out of
this puzzling JourneY, you must step back
      To Find What or who you are trying to
   Find. to begin, here is
the OBject of your Struggle, which

is to say the thing i ask for.
      without determining this, there cannot be a way for
   you to ultimately find
the answer you have come
      to seek, and so you must
   find the aim of this
challenge. so you are hereby tasked,
      iF you darE, to
answer this: tell us why have
      i made this cool

   PUzzle

The code has ...

... capital letters in unusual places. They are:

AFSPUXPUISFFTJYTFWFOBSFEPU

I didn't know what to do with them, but Irishpanda has given me a leg up in the comments: Caesar-shift one back and we get:

   Zero, two, three, six, seven are dot.

Now, take a step back:

The first step in our process was to remove the digits. Now we need them again. There's a number on each line:

    8022     262    5973     012       0

       7       7    2862       2     357
    9357    6480       3     777    6286
      64     339     602     264     739
     371    4400      35    0156      10

We're told that 0, 2, 3, 6 and 7 are dot. Surely that must mean that 1, 4, 5, 8 and 9 are dash — we've got a Morse code! Converting the digits as told gives:

−··· · −·−· ·− ··− ··· · ·−−· ··− −−·· −−··
·−·· · ··· ·− ·−· · ··· ··− ·−−· · ·−· ··−· ··− −·

This decodes to the final answer:

   Because puzzles are super fun!

Well, this one definitely is. :)