In the majority of the cases people pay for online dating so you should get your money's worth.
There are some people who go on three dates per day.
However, this is quite plain so you might want to describe how you like to prepare your favorite meal.
This will make people more curious and it will offer them a more accurate picture of you.
A girl with a sharp picture will get a lot more attention.
You can be sure that most probably the people you date are doing the same so there is no reason for you to feel bad about it.
The best dating etiquette advice anyone can give you is to never give up.
Although you might think that this isn't alright with the online dating etiquette and that it's just serial dating, you should be able to get a picture of what's out there.
The more people you "date", the better you know the playing field.