Noice.
Some tips and small tweaks:
1. Probably change the font color to a slightly darker color or maybe thicken the font a bit as this part could probably be harder to read with higher brightness and contrast screens:
before

after

2. Add a bit of space between the
Existence (weeks): text and the slider because the default value(1) is covering up the text. Or you could also move the value text at the bottom(or inside) of the circle instead.

3. Add a background color to the dropdown toggle as there's too much whitespace between the
Choose Ranks text and the
+ icon on big displays, that I couldn't tell what kind of menu type it is before I click it. like so:
Before

After

or

4. Probably change "Services" to "Miscellaneous" instead, as every single one listed are services anyway.

5. It looks like your site doesn't have the proper meta tags. You might want to add them if you want your site to have better SEO.
<meta charset="UTF-8">
<meta name="description" content="A list of Bitcointalk's signature campaigns, with filtering features. or something lol">
<meta name="keywords" content="Bitcointalk, signature campaign, bounty campaign, ad campaign">
<meta http-equiv="Content-Language" content="en">
<meta name="author" content="shield132">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
Anyway, it's up to you if you want to take my advice or not, and I understand that it's currently in a sort of "beta" mode. I just wanted to have fun with UI/UX stuff.
