I find that imacros are the best way to add friends, dont get me wrong you need to use the software for a while before you get the hang of it, but by not using a program that everyone else uses i stay out of that crown and the trails it leaves.
I use jitbit macro recorder and it does an awesome job. you can try it for free for 30 days as well so you can get used to it and have things up and running before you need to buy. I automate every single thing using macros, you just need to get the hang of it and know where to place things on the desktop and use shortcuts etc.
Buying a bot can be a massive waste of money as most dont offer refunds if the exploit it uses gets fixed, i think that jitbit is $40 on its own or $30 if you buy 5. Well worth it in my opinion and it has made me a lot of money.
Just want to add this:
may I hazard a suggestion, if your one of the people who wants people to add you instead i would always use the smallest groups and pages of smaller and newer games, as there will be an influx of people wanting for people to add them, dont bother with hot sexy pics for this method as you will cut out 90% of the people from adding you. lets face it that method has suffered a massive over kill, if it still works for you then great but in my opinion its fading fast and the quality of the friends you gain from it is very poor indeed.