Any idea how old it was? The update that included warnings for “mining the same block” stopped most of the old block placement exploits.
I suppose if you knew how many blocks it takes to get past that defense you could just build and tear down the same wall over and over again.
They pretty much rekt the gatherer profession over flower exploits, too.
EDIT: I hit boundlesscrafting for some XP data. It’s 44 XP to place a deco oort, and it’s 8 XP to mine a gleam block.
This means each swing of a 3x3 at a gleamball is s bit more XP than placing one deco oort. It’s going to be faster to harvest the gleam, but it also has a continuous cost. You’re burning hammers, pies, and brews.
The block placement has a higher startup cost, to acquire the initial blocks. It’s also going to include cycles of build and tear down. It’s probably going to be slower, but also can be cheaper - depending on how much you do, and maybe you could borrow some blocks. You’re still going to want to burn pies, but all other costs are optional. If you’re cheap and patient just stay at T1 and you cou ld use a totem to break them for re-placement
Machined titanium gives 40 xp on placement and Deco oort gives 44. If place/break/replace is the method you can do it with cheaper blocks.