Doesn't matter what you call it: a visa or something else, if it is similar to US ESTA or ETA for Canada and Australia - it is hardly a burden. Around $7-20 (Australian ETA - is AUD20) and takes 5-10 min online.
This Australian website describes the ETA as a 'visa' :
. It also claims the ''visa' is free - just a $20 dollar 'online application fee'.
The USA ESTA lasts for 18 months, Australian 12 months, so frequent travelers don't have to do it every time. Not sure of others.
Watch out for fake websites.