mariopepper

I guess it was sms marketing tool :D It helped me a lot to get my first clients. I suppose every single SEO or founder should take care about their marketing strategy and personal methods to involve new incomes to your business (doesn't matter what kind of business you have). That's why I can mention only marketing related tools like text message marketing which was my key for successful business.

I use mostly paypal, payoneer, btc wallet and scrill. Mostly my clients send payments on my bitcoin wallet https://bitcoinofficial.org/ or PayPal. These two are most popular payment option nowadays. Especially from clients who work with crypto

forums usually, tech and IT-related

Post of Pay seems pretty cool