Many people do both.
If you want all the girls, do both.
If you want 'cheap' variety, a subscription is the answer. Lots of full shows and some models that you would never have thought to buy will work really well for you. Some will be a disaster for you, delete them, at $0.33 each it is not a problem.
If you want only specific cards, with 260 now available, you are going to need to real patient (or real lucky) to get the ones you want cheap. So you are likely to be paying $2 each.
The choice is nice. Some people will have collections of 25 cards for $50 and exactly what they wanted. Others can have 190 cards for $60. Any yet more can collect them all, but starting now with a subscription is going to be expensive.