MSE is damaging, but it has only really killed off the low hanging fruit. The boards rules, and the risk averse nature of the posters, means that all the more advanced stuff is still out there and generally in healthy shape.
As for casino bonuses then there are high variance if playing for high ev/ hourly rate, but this can be offset with also doing other types of advantage play. Matched betting can be a steady addition alongside the wild swings of casino bonuses. Personally I do several other forms of risk AP and it is very unlikely that they will all be performing badly at the same time and have had only one losing month this year so it has evened out.
I find the posts on MSE quite pathetic at times especially when somebody merely hints at gambling. Then 5 or 6 people jump on them like they own the forum and pat each other on the back.
Good post btw - Gibber.