Best Way Of Tipping The Web
Tipping is a form of gratuity, a recognition or appreciation of something like a useful content or online service, a helpful video, an exemplary music, etc. When you like a post/photo on Facebook you click the "Like' button, but in tipping you back it up by paying a micro amount(usually in cents) called a tip to the content/service provider.
Sites like Flattr cater to tipping, however, it uses PayPal for payment processing and I have a very nasty experience with PayPal. I avoid it like a plague.
If you're a supporter of Buy Me Coffee type of tipping, check out at Ko-fi and Buy Me A Coffee.
AddThis offers a Donate Button that supports Amazon Smile, Cash.Me, Patreon and Venmo, on top of PayPal.
Since tipping involves micropayments, I think Bitcoin is better suited for this purpose. With Bitcoin it is hassle-free to send tiny amounts and doesn't entail any deductions or fees. Plus it doesn't require any integration of third party buttons/links on your website, you just need to show your bitcoin address to start receiving tips.