OK, so this offer wall thing is a joke, it's a horrible idea.....
Here's a couple ideas for players ViP/Premium/FtP to earn a few more bonus points.
Favor system: OK we all know the roll a toon quik run to 100 favor for the free 25 Tp's. Kind of lame if oyu ask me... How about this.... Leave the current system of 25 Tp's per 100 favor, BUT after you hit 1,000 favor incrase it too 75 Tp's per 100 favor, and then after 2,000 favor, make it 150 Tp's per 100 favor.
XP cap award:
OK, here's another reward players for capping a character. Give them a free 500 Tp's for hitting the XP cap.
Small amounts yes, but far better than the offer wall.....
Any more ideas out there? Try to remember that the ideas have to be non-exploitable to have any chance....