But it isn't all in boosters. Remember that every day of season you get 40% of condition which is a bit over 1000% for whole season, and that would be like you spent 60-70 boosters. That means your player should gain 40-50 skill points per season without bonus skill points (MOTM and friends gifts). And if you add on that another ~70 green packs, you get quite good growth. For me it was much easier to get boosters than to get tokens. For someone who gets easier tokens than packs, of course it is easier to use scouts.