About that <3 betting $13 leak?

$0.5/$1 No Limit Holdem
3 players
Converted at weaktight.com

Stacks:
BTN ($114.00)
Hero (SB) ($183.85)
BB ($200.00)

Pre-flop: ($1.50, 3 players) Hero is SB
BTN calls $1, Hero calls $0.50, BB checks

Flop: ($3, 3 players)
Hero bets $3, BB folds, BTN calls $3

Turn: ($9, 2 players)
Hero bets $4, BTN calls $4

River: ($17, 2 players)
Hero bets $13, BTN goes all-in $106, Hero calls $93

Final Pot: $229
BTN shows:
Hero shows:

Hero wins $228 ( won $114 )