My advice to anyone using, or considering using, ANY particular payment option is to research, research, research. Read every single word available on the payment alternative's website, ESPECIALLY the fine print, and make sure you understand EXACTLY how the process works (how you can get $ to them, how they pay the casinos & how long it takes, how your winnings are handled and whether they have to or are able to be sent back to that funding alternative, what fees are charged and whether fees are charged for every time money is moved or just for the initial deposits you make, and exactly how or if you can get cash back from your balance at the funding alternative). I have noticed that people are using funding mechanisms without having any idea of how those mechanisms work, and that is very dangerous. Always read everything, and remember that the fine print often has the most important information (I realize it's boring to read all that info, but this is your money, and if you don't read everything, you could easily be throwing your money away - plus, by reading everything, you may be able to reduce the nervousness, confusion, and uncertainty that so many people experience when using new funding mechanisms). And in addition to reading everything on the website of the payment business, check with places like the OPA, Casinomeister, and other sites that try to keep people informed of legit & dangerous businesses. You can also ask about the payment businesses on message boards you use often, but keep in mind that many disreputable businesses hire "shills" who are employed specifically to visit the message boards & to say wonderful things about the business, while pretending to be regular players, rather than employees - so it's important to find a couple of message boards you like and get to know people, so you can get to know some of the people and know which people you consider to be reliable and people who have the same standards & expectations you have (it's only natural that different people have different expectations and needs, and sometimes disagreements may exist about whether a legit business is worthwhile - that's why it's good to get to know which people share your own expectations - that way you can know that sometimes everyone is correct in their own way, but follow the lead of the people who have the same wants & expectations you have).
Bottom line - don't deposit money at ANY business you haven't researched by reading everything on their site, especially their rules & regs & procedures, and by checking to see if legit advocacy & info sites like Casinomeister have issued a warning or a positive statement about the business (& keep in mind that if you see nothing negative, but also nothing positive, about a business from Casinomeister, that doesn't mean the business is legit - it just means Casinomeister hasn't had enough info to take a formal position on it, so be careful always).
Regarding the question about PayPal: PayPal will definitely be terminating its casino transaction business after the merger with EBay is complete, but it will continue to handle casino transactions for quite a few months still, and won't terminate that part of its business without giving plenty of notice to users. Log into your PayPal account, and on the main Overview page, you'll see a list of links on the left side - one of those links is to "Policy Changes/Announcements" (or something like that). Click on that, and you'll be taken to all the policy announcements & changes, and see that announcements are made several weeks, usually a month or more, before PayPal implements a planned change - and there is no announcement yet regarding termination of casino transactions. Also on that left side of the overview page is a link to the official statement about the EBay merger/buyout - click on the link, and you can read the official statement about what will be happening, and in that statement, yes, it does clearly state that PayPal will stop handling casino transactions once the EBay deal is completed (estimated date of deal completion is around the end of the year). But again, that is months away, and PayPal is still handling casino transactions now and hasn't given notice of a date of when it will stop (I recently learned that several of PayPal's competitors have been sending out e-mails that are supposedly from PayPal, saying PayPal has terminated all casino transactions now, & recommending the payment alternatives that are actually writing & sending out the fake e-mails - those are fraud e-mails, and if you receive such an e-mail, you can easily see that the return e-mail address is NOT PayPal - always beware of fraud in this industry - you can avoid a great deal of the fraud by carefully reading any e-mail and questioning everything you read - and remember that when it comes to PayPal, you can go to the PayPal site to get the real story, since they post all policy changes for you to read).
Good luck!