I'm actually failing to see your point in raising the multiple browser thing...it's not like they can bet more than once per account. If an individual is on 15 servers, good for them, it's a lot of work to make all those bets, keep up with GWs, and run all the accounts. If they're alts, it's not like you can transfer spirits between accounts, so not an issue.
It is an issue because they can use the tickets to buy coins or credits and then farm the alts.
The opinions expressed on this post are my own as a player, not as a Moderator.