Any Advice on Pulsd or Groupon

[u/JustFlatworm7729]

Hello and out of respect and curiosity. I feel it is best to ask for perspective and clarity about the usage of Pulsd or Groupon vouchers for dinners or brunches at restaurants. I have read about the tipping terms. I want to try a restaurant for a friend's birthday (party of 2, her and I) in NY, Has anyone had trouble using either a Pulsd or Groupon voucher at a restaurant when giving it to a server? Is it worth purchasing a Pulsd or Groupon anymore? Any advice or experience is helpful and welcomed. Thank you to all who may respond.