Double Up Sit N Gos

What are your thoughts on these SnG's? I've not been a big player of SnG's in the past and as a matter of fact haven't been playing much since black friday. I just recently started playing again of Bovada. I've dinked around a bit with the DU's SnG's and find I kind of like them since I am a tight player anyhow. Now I'm thinking they may be a good way to build up the bankroll. My main question is what is the appropriate bankroll for these games? Should one have 50 bi's or is it much higher do to varience? Any other advice would be helpful.

FYI I found the series in the stickies!

I thought Double or Nothings were fading out after the chinese collusion scandal?

They're really not a good way to build up a bankroll Harley. Most sites don't offer them for a reason anymore. Potential edge is very low, and there's a lot more to them than being a "kind of tight player" - ICM calculations are crucial when you're trying to just cash, not win, for the whole of the tournament. The other problem with the low edge is that it's well suited to collusion; just knowing one other persons cards can increase your edge a lot. This might not seem like a big thing now but given there's a lot of very ICM heavy thought processes which you wouldn't find in normal SNGs you'd have to learn, when you did want to move up you'd have a lot more learning to do in other games.

Guess I'll be reevaluating this decision. Thanks guys for the input!