I know more than you'll ever know about gambling. I know that gambling is far best done at best odds with bookmakers that you can be sure that they will pay. I know what rollover is, and I will only take a bonus with a bookmaker and therefore start rollover with a bookmaker that is reputable and that I'm sure will pay.
Let's contrast that with you, you say Topbet has been around since 2000, that means nothing as it is obvious to anybody with half a brain cell that the current state that they are in is that they are on the brink of or already at the stage of going under, but you still think signing up with an on the brink bookmaker like Topbet is a good idea and consequently being stuck there not having a clue whether you'll ever see your money again because of your bonus hunting at bookmakers that "may go under or they may pull through."
There is only good money to be made with bonuses if you are sure that bookmaker will pay you, otherwise it's just monopoly money. You really need to stick to the reputable ones that you are sure will pay, otherwise this most certainly won't be the first potential stiffing you come up against with your stupid strategy of bonus hunting with dodgy bookmakers. And don't try and kid yourself that you can afford a stiffing because you don't bet -110 lines, whatever lines you bet won't shield you from a stiffing, stop kidding yourself, you didn't sign up with Topbet to get stiffed, and now faced with the real chance of getting stiffed, you're panicking and trying to make excuses to save face, and it doesn't wash whatsoever.
And regarding the lines I bet, I simply select the bet I want, I find the best price in the world for that selection and I bet at the best price in the world that any reputable bookmaker is offering that will let me bet with them. It really is very simple. And I most definitely don't lose when betting as I am a long term winner. And number of times I've been stiffed in years of betting? Zero. Reason? I have nouse, common sense and some brain cells that allow me to deduce that bookmakers like Topbet are obviously an awful proposition to sign up with. You really need to add these qualities to your armoury before you ultimately inevitably get your whole bankroll wiped out by scam and broke bookmakers like Topbet.