I don't believe you will ever see monthly recurring charges in regards to tournaments for the same reason there has never been an entry fee to play one. Its a legal nightmare with all the anti-gambling laws here in the United States. Some may say, just offer entry fees to players in other countries that have more relaxed gambling laws, but that won't happen either due to the fact that GG is headquartered in and has its servers based in the US.
Now, the website can charge a monthly premium (like IHub does) for services provided, such as discounts on micro-transaction store items, or 1 on 1 tutering from a gaming professional, etc. Never tournament fees coverage for games of chance though.
Your "better then sliced bread" Laken knew that IMO and never had any intentions on making revenue off of the tournaments. Fortunately Dorwart is now in control, knows this (again all IMHO) hence the tournaments which weren't profitable at all are no more.