chess.com has a lot of good stuff. I played a little, there, for a while, and was willing to pay $7.99 a month at a time, for 2 or 3 months, in order
to look at their instruction videos. Then I discovered I could get all I wanted for free on youtube. I gave it up because the people there are mostly very stupid and adolescent, and it is a glorified social network, as well. Batgirl's Blog is very good.
I have just discovered what I think is the best site of all, in terms of the quality of instructional materials: chess24.com
Any of you who don't know about it should have a look. Their main man, GM Jan Gustafsson is very entertaining as well as a very interesting teacher. It costs $9.99/mo. in order to be able to watch their instructional videos, the which come with an e-book version as well ~ very valuable.
"Slow" games on chess.com, but on chess24 the longest games available are 60 min. + 30sec.
All in all, for longer time-control games such as we play here, I like this site the best. We have good, serious players here. Even in slow games, the chess.com people
were not as serious, tended to play too fast, resulting in lower-quality games.
I have not made a donation here, yet, but I intend to, as soon as I am back in the US. I should think that the privilege of being able to play here is well worth $5/mo. given that there are no fringe benefits. I would have no problem with it being mandatory.
And as you will probably be reading this, Greg, good job, and thanks.