They can produce some spin, but are mostly used for flat hitting. They are not as easily controlled as short pips. They are mostly used by defensive players to neutralize an attacker's spin. There is often a synergy effect between blade and rubber that makes certain combinations work particularly well with each other. There is also a technique called re-gluing.
Players peel the rubber off the blade before they play and apply a fresh coat of glue.
That increases feel, spin and speed by a substantial amount, so much so, that only few top players play without the benefit of that technique. Coaches usually do not recommend a player start using speed glue before their strokes are well grooved which usually doesn't occur until a few years into their training. For players who choose to use speed glue, a springy, vibrant blade and a soft sponge will produce the best effect.