I try to keep about 10% of my bankroll there.
Let's face it - you'll bet the market price by 4 cents a bet when you play there. At 1.8%, if you roll your money over 52 times, you can lose your entire balance and still be even.
So... if you roll your money over every 2 days (which is trivial now that MLB is done) for 3 months, you had the best of it, even if they go under.
Ok, but Mansion IS doing some positive things (from a bookmaker's point of view). First, they are limited their liabilities in areas they are not prepared to compete. They have lowered limits and raised juice in a couple niche sports. Bad for player profits, good for deposit confidence. Second, they are betting out more and more of the larger plays they take. If a wiseguy hits them for 10 dimes at -110, and they have to lay it off at -112, sure they lost $100. BUT, the are inceasing volume. If they know how to exploit sharp opinions, that $100 was cheap for what they know.
I don't vouch for anyone. But my best guess is that they'll be around a year from now. If not, I'll lose roughly 10% of my bank