Funny, I asked a similar question on another forum recently, and the consensus was something like "don't turn on adsense, it looks spammy." I'm not sure if they were objecting to adsense or ads in general.
I have to say, I was a bit taken aback by this advice. Given the penetration of adsense in this day and age, I hardly think it looks "spammy" unless you throw giant ad units up on all sides of the page.
Anyway, I think you put it in right from the start if you're sure that's your revenue model. Most people are used to seeing ads, especially on content sites that clearly aren't going to charge money. As someone else mentioned, just don't make it obnoxious.
I asked a similar question on another forum recently, and the consensus was something like "don't turn on adsense, it looks spammy."
This merely tells you that the audience at that particular forum are too young to have to pay their own bills, or too 1337 to be worth listening to. If you're building a business website with the only monetization option available being ads, then of course you're going to turn on ads. And AdSense pays better than many options for many sites, so it's the best choice more often than not.
I have to say, I was a bit taken aback by this advice. Given the penetration of adsense in this day and age, I hardly think it looks "spammy" unless you throw giant ad units up on all sides of the page.
Anyway, I think you put it in right from the start if you're sure that's your revenue model. Most people are used to seeing ads, especially on content sites that clearly aren't going to charge money. As someone else mentioned, just don't make it obnoxious.