It takes the same number of points you've earned , since the day you signed , on to go from level 6 to level 7 .

5 to 6 = 2,500 points
6 to 7 = 4,000 points
7 to 8 = 40,000 points
8 to 9 = 150,000 points
9 to 10 = 800,000 points

Things slow way down after level 6. I'm closing in on level 8 and if I'm around for a year or two I might make it to 9 but to the limited extent that points motivate me I think it mostly goes away at level 8. That's okay; I'm just here for the fun of interaction anyway.

Don't hold your breath ! And THEN there's level 8 - an eternity away ...

It was 5 months or so for me.