What would they have to gain by tampering with visa requests. They are paid a commission on handling the paperwork and liaising with clients in the local language prior to submission to the embassies. They are paid if you pass or fail. I don't get it?
I've got one 3 times at BKK with no problems. Make sure you have a photo as sometimes the photo machine is broken and they send you back outside to get one. Usually they just do everything for a 200 baht compulsory fee. It's up to you to weigh up the risk of it not being available and losing your permission to stay vs time at immigration.
Technically they are incorrect because it doesn't mention during the validity period. It gives a blanket statement that there is no need for a re-entry permit when one may be required during the final stay previously mentioned in the article. Anyway I just think it needs clarification. But up to you.
Their O-A advice is wrong. Bank funds are in home country bank. The income letter doesn't require an affidavit. Also METV need a reentry permit during the final extension. I didn't read the whole thing. There may be more errors.