The spam issue is a real one for FB - they can keep altering the API & rules for developers, but offenders will keep trying to game the system in true cat & mouse style.
Developers who play hardball know the game will be over soon & are trying to score as many installs as possible before then so they can cross-market their newer apps later when things have been tightened up. No-one wants to pay another network for an install!
The flip side to this is a growing desire for a brand of apps are known as "non-spammy" and that is what we at THiNGi are building. Launching Valentine's Day!
