This. Exactly. If Bovada wants to limit during a roll over then do it. Many books do. Betus does it. BAS does it. Wager web does it. Etc...Max bet for bonus rules are silly. If Bovada wants to limit his max bet, they should do it through their software. Not buried in T&C that no one reads.
Sports gambling cardinal rule: Take a bet, pay a bet. Bovada is breaking that rule.