Thanks for sharing what you do. It is very useful and interesting.
Looking at the SPP harvester website past SPP's, I am guessing SPP offers are becoming less and less attractive with not many in 2021 & 2022. Or it could just be they are attractive in specials years (COVID 2020, after GFC etc). I note for a recent SPP for DEG, they mentioned "many were from applicants who held an “unremarkable” shareholding, with a “significant number” from people who owned just one share in the company." and they reduced unmarketable holdings holders to $500.