please specify how many tabs a user may open? why not say 1 or 2 etc or no additional tab is allowed! an easy rule for all
Isnt it clear already? it has been stated that they do not want any user to open additional tab for faster betting purposes
We do NOT want users to open up multiple tabs to bet.
Im not a native speaker but I do understand the meaning of that bolded word completely. You could always set your site to deny the other tab when someone tried to open up multiple tabs for betting