Have you ever looked for reviews online ?

I had and I do it. Not always, to tell the truth as it seems sometimes
to be to much time consuming. Finally, if the program is from a person
whose program you have joined in the past and you have good experience
with it you can leave this step out.
But especially if you are ready to pay for it you can at first check what
is written about it online - you can find reviews here
https://amvsmlm.com/category/affiliate-marketing-product-reviews
but in fact there are more sites were you can find info.

You do not need to take some of the reviews as hundred percent right
but it is good to learn more about a program you are going to invest your money
and time in.
You can often find quite a nice description of the program and get an idea if
it is suitable for you or not before joining it.

In case you have your own list where you send offers of different affiliate programs
to your subscribers you should know what are you offering...
because it prevents spreading of all the scams online...

Have a nice weekend,
I would like to read your comments

Margaret