I would never consult one of these coaches or pick up artists.
Most Helpful Girl
There is no one-size-fits-all solution to finding someone, even if you have a tendency to chase the same types of partners as everyone is different. Also, there is a difference between short term and long term results. I find it is just better to be yourself and like who you are because then you will attract people who like you for the right reasons even if you end up attracting less people.
The purpose of coaches is either a selfish money scheme or just tips on boosting your confidence and being brave enough to step a little out of your comfort zone because you can't expect things to happen if you do nothing. There is a lot of crappy advice out there though so watch out! If it seems like a game or scheme, it probably is.
Most Helpful Guy
Pick-up artists are largely scams to get guys to pay money for "advice" which helps them with ladies. Hence why they're all subscription-based or very vague.