They are getting increasing revenues via Nat. gas/oil.
The Saudi/Gulf States aren't getting much in return yet. And the FSA seems to not be getting the type of weapons they need. RPG 22. Even 18s would help. Still using the old 7s from Vietnam era. They need longer range weapons. FNs. G-3s, etc. They are outgunned. No air cover. Under constant arty/mortar/tank fire. Doesn't look good for them at this point...
The Russians have much better things to do with their Gas/oil money than blow it on propping up Assad. Like steal it and stick it in the west. The old regime was happy to waste resources on geopolitics. The kleptocrats not really.
And their gas/oil is a wasting asset, as alternate sources are popping up everywhere. Even Israel !
We don’t know what weapons the FSA really has. Our visibility to what is going on is poor. And they don’t need RPG 22’s if the strategic problem can be solved by blowing up truck convoys.
This is guerilla war, the goal is not necessarily to meet the regime forces on equal terms, but to control the population and exhaust the other sides resources.
The regime on the other hand has to pacify the population sufficiently as to be able to demobilize without risk, as long term this scale of mobilization and destruction is not sustainable, both to the Syrian regime and its backers.
Much more difficult problem.