The company I use to work with no longer operates in the market due to legal issues. that's what my client said to me. As these members were gamblers, definitely these are double optins. I would share you a snapshot of the past campaigns we have sent.
It's blurred and the image is very small you're a marketer so you should know how to properly configure images why not use this image uploader
https://www.talkimg.com/ you're showing us a blurred image for the sake of showing us something, you're good at shilling your service without giving us proof, will it harm the newsletter if you are transparent on your stats and your clients, we can understand if that's the case but the image you show us is so annoying for us might as well give us something that we can see.
What image are you referring to? Was it in the first post? Well I think it was clear and not very small, although once you click it and redirected to Ibb/Imgbb, it is. But, it is still not necessary.
The image hosting site you recommend is still great and might be better than Ibb and others since the image posted can get corrupted later on, but not with Talkimg since it is specifically built for this forum and is well maintained by some our co-forum members. Once we use it, we are also showing our support to them or to this forum Bitcointalk. Proofs are available on PM as the OP said but why won't he just post it here? To remove the doubts of the users.