I just found this thread.. thought I'd share a little insight with people. I'll try and lay things out where they actually make sense but please realize that the credit card processing industry is so convoluted that there are people in this industry that have been here for 10+years that still don't know everything and the "rules" are always changing. (I've been doing this for 4 years and will be the first to admit that I don't know EVERYTHING.. always learning, it's the best part of my job)
I'm doing my best to keep up with the influx of PM's, emails, and phone calls that I've been getting and am having loads of fun working so closely with the suppliers. Keep em coming, makes my days all the more interesting
Paypal is not a merchant processor, when paypal was made it was intended for use on Ebay only and so that people could sell stuff on ebay and get their money. It was never intended for use by a business for their purposes and they do not have the systems in place to handle that sort of volume (even after all this time) They don't have the regulations to properly mitigate and manage risk nor do they have systems in place to protect the suppliers from fraudulent consumers. (Not that I'm insinuating anyone here is like that of course) Paypal is what we would call an aggrogator. Basically they have a merchant account with a decent rate set up with some unknown company (I've never found out for sure who) and then they process your payments through their systems for an extra fee. It's a wonderful service if you've got a garage full of junk you want to sell online, not good if you're trying to run a real business. They cause problems for all types of companies that try and operate a real business through them, anyting more than $1000 a month in sales and it's both a waste of money and needless risk to use paypal over a real merchant provider. The only regulations they have to follow are their own.
Merchant processors are a completely different conversation to be perfectly honest with you guys. Someone (I'm too lazy to reread and see who) mentioned federal banking regulations... even credit card processors don't have to follow federal banking regulations, we're not banks (even if you go to chase, or BofA they don't have to follow federal banking regulations for the card processing end of things) The only federal banking regulations that we are subjected to is that we must have a FDIC insured bank to transfer and manage funds. The terms and conditions have to meet Visa/Mastercard/Discover regulations and IF a supplier chooses to subject themselves to the higher pricing of Amex, theirs as well. V/M/D regualtions are fairly loose and typically only involve fraud protection/prevention and dictating what the merchant/supplier can and can not do with their customer's credit cards. Most regulations allow the processors to do all sorts of things including presenting pricing and rates that the supplier/merchant doesn't understand, locking them into contracts undisclosed, charging higher pricing than origionally quoted, raising rates and fees, and all sorts of other nasty things.
Because of this I strongly advise AGAINST having a list of suppliers shut down by paypal posted carelessly on the internet for just anyone to access. There are a lot of sharks out there that will smell the blood in the water and spam these poor suppliers with "free" offers that will ultimatly result in the supplier paying much much more than they need to and in some cases cause enough problems to ultimatly run them out of business. I spoke to a few suppliers last week that experianced just this and I won't name names but if they'd like to speak up it would probably help so that others could more easilly understand what I'm talking about.
I won't directly contact our suppliers to harass them for their credit card processing (though admittedly I tease a few just for kicks and giggles) I'm here, it seems like just about everyone knows that I'm the one to come to and if they want to talk to me they are welcome. I'm not a sales person at my company so I have no insentive to upsell or over charge anyone. In fact.. just the oposite, I give people good pricing and some are so happy with me they send me freebies

Suppliers that want to talk are more than welcome to PM me.. and even non suppliers can PM me if they want more info though I'm not in the business of advertising our pricing where our competitors can get a hold of it.. the boss would kill me if I did that
Sorry for the long post.. I think I skimmed the surface enough to paint a picture for people to understand. No Paypal aren't evil jerks out to get the PV industry.. they're just incompetant. Sort of like a "lemon lot" as opposed to a reputible car dealership.
Again- Please don't post suppliers names for them.. doing so could get them spammed, waste their time, and maybe even result in slower shipping and customer service for you because they're too busy clearing their inbox of crap credit card processing offers.