In a way it's a similar spot to Langley's with the 77, "edge pass" I think is the phrase when a spot is profitable but future spots are going to be so much more so.
It's the difference between ChipEV and $EV. Lets spose you have a 100k stack and you make a move preflop with a ChipEV of +15k, if your $equity in the tournament was £1,000 I promise you increasing your stack by 15% will literally never make your $Equity £1,150, it'll likely increase in very marginally. however if you have to risk your whole stack for it then the cost of the move going "pete tong" is £1,000 as you'll be out of the tournament.
So actually its a +EV spot theoretically but it's losing you actual money. Obviously due to metagame/gameflow/table draw or whatever you might every so often be obligated to take one of these spots but 30bb deep with 8high facing a 3bet from the blinds against your BTN open just seems like it can't ever be one of them, just like TL's 77 was nothing except a fold imo.
Obv in a cash game w/e do it take the £150 in equity and re-load if it goes tits up.