Please stop with that narrative and take my comment into consideration:
When Soulbound cards were announced there were always talks that they could be unlockable, in the future. No one, at the time, thought it could be anything other than the burn value. That's a very fair situation: no DEC is ever minted with this.
2x fee to unlock, even with voucher discount, is already move expensive than it should be. I'll still vote for it because people are crazy about wanting even higher fees. Just think about 5x. There's no way anyone will ever pay $62 to unlock a GF legendary. Add all the market fees that now exist, plus the risk of not being able to sell it for enough to make a profit, and the cards are still basically Soulbound. You can buy GF legendaries for cheaper than that unlock fee from CL regular and rewards set!
The cards can't stay Soulbound forever nor can they have such a high cost that no one unlocks them. This would be very bad for any new player joining in after those cards are not being printed anymore. Even anyone joining now would be screwed out of many of them. Even players who played the whole time at lower leagues, if they eventually want to invest more and move up, would be stuck with low levels for these cards.
SB cards are not intended to be profitable. The value is in the cards themselves, not in what you can sell them for. That's literally the point of a soulbound item.
The only reason they need to be unlockable is so those who didn't get to earn them while they were in print can go back and get them. There is no reason this needs to be available for a cheap price. You say $62 is too much for a GFL, yet we have GFLs that sell for 100x that (even before they had PP value for land).
It's not so much about them being profitable but more about them being available to play for everyone who wants to play with them. How can we get new players to stick with us when they see they can't get some of the important cards because they are super expensive even though most old players have them? Or worse, if the cost is high and there's a time limit to unlock and when they join they simply can't find the card. They're gonna give up when they see they can't access the card. Anyway, if I'm going to sell them, I still want to profit and not have to gamble taking a huge loss.
Those GFL that cost 100x are from older sets with very low print run. These cards have a high print run but you want to artificially make them expensive.
At that point I'd rather have them stay soulbound forever and use a similar system to dust in hearthstone where you can burn cards for dust and use it to get other cards. We could apply that to soulbound cards and allow it to be used on older and newer soulbound cards.