As
pesos said all you need is points...plenty of opportunities to fly F at Advantage rate. As for PPS, yeah surprise surprise some of us live in Singapore/Asia and fly (have flown) SQ business class almost weekly for work...not hard to exceed many multiples of $25K. The old Solitaire threshold was $250K (within 5 years)...just imagine.
* As for those bloggers, you don't suppose they are trying to entice you to click on their articles, do you? 🤔