A treasure hunt! ^_^ Well played, in the values of the transactions. Since zeroes get knocked off the end, I padded the values with zeroes to get this. Definitely meant to be ASCII text, but I think because the transactions came through at the same time - as you found - the letters get scrambled.
It looks like the big block of deposits was a batch of all the "letters" being refunded. Below, they're broken down into three distinct segments, at different times. We can assume these are groups to be unscrambled on their own.
01110101
01100101
00100000
00100000
01100010
01100101
01101110
00100001
01100101
01100001
01100001
01101011
01100100
00100000
01110010
01101101
01101001
01110000
01101100
01100100
01100101
01101001
01101100
01110011
01110011
01110100
01110011
01110010
Which translates to:
ue ben!eaakd rm
ipldeil
sstsr
Probably just mashing the keyboard or playing with a script