This is interesting link as I agree pretty much with all pros and disagree with most cons:
10 - "Marriage will make her let herself go". It depends on a woman, and I bet everyone can come up with some examples when it is not the case.
9 - "Marriage is the end of options". Not necessary. I know quite a lot of couples who have been married for a long time (some over 50 years), and are not monogamous. If variety is important for you, find a girl who wouldn't have problems with that. They exist.
8 - "Marriage is expensive". Wedding is as expensive as you make it. We got married in a city hall on the way to work, it took us 15 minutes and something like $2 fee. We threw in a little party afterward, but I think we've got more back in gift that we spent on it. My friend got married here in US recently in Vegas, and I doubt it cost them more than $200.
7 - "Marriage is just paperwork". Which comes with important government-provided benefits. Estate, hospital visits, dependency on health insurance and so on.
6 - "Marriage is the end of spontaneity" - didn't get that one. There will be still enough spontaneity in life.
5 - "Marriage is constant compromise" - true. But if you choose your partner wisely, you won't have to sacrifice a lot (if anything).
4 - "Marriage is the end of sex". See 9.
3 - "Marriage often fails". So does everything in this life. Driving often fails too, drivers die every day in crashes. And life ALWAYS fails.
2 - "Marriage is the end of taking risks". Again, choose wisely. I skydive, and my wife accepts the risk which comes with it. We also have a lot of skydiver married couples.
1 - "Marriage is forever". No, it is as long as both of you want it.
One of valid reasons NOT to get married, though, is if you both make a lot of money. My accountant said couple of years ago that being married costs us around 10K a year in taxes. Well, now we see how much our love worth