base64: bThvW3JKYz16bXpUWDIufkl2OllseC4maV1gMjtVYXNtb2RyZ3czbkQzQDtnZnRdMVZuZkIqVTJpIGlxa2xubkAoaTRueGdQaGN0YyRjTGN1WGlUbzF5VU5qcz50KmRwZXlncGN0dA==
  text: m8o[rJc=zmzTX2.~Iv:Ylx.&i]`2;Uasmodrgw3nD3@;gft]1VnfB*U2i iqklnn@(i4nxgPhctc$cLcuXiTo1yUNjs>t*dpeygpctt
  letters:  $&(48:=>BDIJLNPVY[`aehjkquvw~*.13;@TX]dflprsxyz2Umogintc
  counted: 111111111111111111111111111111222222222222222222333345556
  progressively hiding infrequent letters:
  m o r c zmzTX2.     lx. i] 2;U smodrg 3n 3@;gft]1 nf *U2i i  lnn@ i nxg  ctc c c XiTo1yU  s t*dp ygpctt
  m o   c  m   2          i  2 U  mo  g  n    g t   n   U2i i   nn  i n g  ctc c c  i o  U    t     g ctt
        c                 i           g  n    g t   n     i i   nn  i n g  ctc c c  i         t     g ctt
        c                 i              n      t   n     i i   nn  i n    ctc c c  i         t       ctt
        c                                                                  c c c c                    c

Well, ROTing that doesn't yield anything either, and it's too small to analyse character frequency if it's a cipher. I tried using 'thinkcode' as a substitution key, and the end looks a bit like 'thinkcode' itself!

I spent entirely too long parsing that in my head just to see if you could be right...